CN102129541A - Radio frequency identification system, reader-writer, tag and communication method - Google Patents
Radio frequency identification system, reader-writer, tag and communication method Download PDFInfo
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- CN102129541A CN102129541A CN2011100487860A CN201110048786A CN102129541A CN 102129541 A CN102129541 A CN 102129541A CN 2011100487860 A CN2011100487860 A CN 2011100487860A CN 201110048786 A CN201110048786 A CN 201110048786A CN 102129541 A CN102129541 A CN 102129541A
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Abstract
The embodiment of the invention provides a radio frequency identification system, a reader-writer, a tag and a communication method. The communication method comprises the following steps of: detecting the tag entering a radio frequency electromagnetic field, wherein if a prestored own radio quiescence command of the tag entering the radio frequency electromagnetic field is nonzero, the tag enters a radio quiescence state; and sending a nonzero wakening command to the tag to waken the tag so that the tag is switched from the radio quiescence state to a ready state, wherein the values of the radio quiescence command and the nonzero wakening command are equal. In the embodiment of the invention, the tag in the radio quiescence state can be wakened to be switched from the radio quiescence state to the ready state only when receiving the nonzero wakening command so as to execute a subsequent checking process to ensure that the only identifying information of the tag is protected by adopting the nonzero wakening command; and the tag can not be checked without an accurate wakening command, and the only identifying information of the tag can not be acquired, therefore, the access safety is enhanced and the illegal communication is effectively resisted.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of radio-frequency recognition system, read write line, label and communication means.
Background technology
Passive radio frequency identification (RFID, Radio Frequency Identify) system comprises label and read write line.REID is a kind of contactless automatic identification technology, and it is by the automatic recognition objective object of radiofrequency signal and obtain related data, and identification work need not manual intervention, can work in various rugged surroundings.The RFID technology can be discerned high-speed moving object and can discern a plurality of labels simultaneously, and is swift and convenient to operate.Its principle of work is as follows:
Read write line send information to one or more labels by the modulated RF carrier signal, and label obtains the working power energy by the RF electromagnetic field of read write line; Label information is according to certain coded system coding; Label comes transmission information by the amplitude or the phase place of backscattered modulation radio-frequency carrier; RF carrier wave and the backscattered answer of the intercepting label information that obtains label of read write line by sending a non-modulated; Read write line is deciphered label information; Communication between read write line and the label is semiduplex.
Passive label mainly is made of antenna system, radio frequency unit, logical block and storer etc.It is consumed by internal circuit from the energy part that read write line obtains, and another part is launched by antenna.The answer signal of label is that baseband signal is modulated on the high frequency carrier that read write line sends, and sends to read write line by wireless mode.In rfid system, be to carry out logical process in the logical block of label with state machine, make label after receiving the read write line order, can correctly carry out processing response.Label has different responses to various command under different states, this relies on the tag state machine to handle, and the confidential label that can guarantee of tag state adapts to all orders in the air protocol, the state machine lock-up condition can not occur simultaneously.
Fig. 1 shows the tag state transition diagram in the EPC agreement of prior art, mainly comprises preparation, judges, replys, confirms, opens, encrypts and kill state.As shown in Figure 1, its state transitions is as follows:
Standby condition is used to represent that those both be not killed and do not have currently participating in one and take turns the label of checking that has powered on yet.After entering into a radio frequency active region,, then will enter standby condition if label is not killed.Label can keep standby condition to receive querying command up to it always.Label can produce a random number, and deposits this random number in time slot counter, if this random number is non-vanishing, then label changes the judgement state over to, if random number is zero, then label changes response status over to.If label is in non-any one state that kills state, enter standby condition when after power down, obtaining energy again.
The judgement state is used for representing that those participate in the current round of checking, but that part of label of time slot counter value non-zero.The label that is in the judgement state can reduce the value of time slot counter at every turn after receiving the repetition querying command, when the time slot counter arrived 0, label changed response status over to.Otherwise will remain on the judgement state.
Label can RN16 of reflection after entering into response status.If label is received an effective acknowledgement command, it will change the judgement state over to, return unique identifying information.If label does not receive acknowledgement command, perhaps receive invalid acknowledgement command, then change the judgement state over to.
The label that is in the affirmation state can be transformed into all states except the state of killing, and this depends on the instruction that receives.Be in the label of affirmation state, if its access code non-zero obtains instruction and the time will change open state over to receiving random number, send a new RN16, read write line just can use this RN16 in order afterwards, label also can use this RN16 in answer afterwards.It is the all-access order that can carry out except locked that label is in open state.Can be when label is in open state according to the command conversion that receives to all states except the affirmation state.
Be in the label of affirmation state, if its access code is zero, then apply for again changing encrypted state over to after the RN order receiving, send a new RN16, read write line just can use this RN16 in order afterwards, label also can use this RN16 in answer afterwards.Be in the label of open state, if the access code non-zero then is transferred to encrypted state when receiving effective visit order, and the identical RN16 that when the affirmation state is transferred to open state, is launching before keeping.The label that is in encrypted state can be carried out all visit orders.The label that is in encrypted state can be transferred to all states except open and affirmation state according to the order that receives.
Be in the label of open or encrypted state, receive one have effective non-zero kill password and effectively RN16 kill instruction after can be transferred to the state of killing.Kill and make a permanent incapacitation of label.In a single day label enters into the state of killing and can notify read write line to kill to operate successfully, and can not respond read write line later on.Kill label and can all remain on the state of killing in any environment, also can immediately enter into kill state after powering on again next time.It is irreversible killing operation.
Fig. 2 shows the tag state transition diagram in the ISO18000-6B agreement of prior art, mainly comprises outage, preparation, identification, exchanges data state.As shown in Figure 2, its state transitions is as follows:
When label does not have power supply, be in off-position; After powering on, label enters standby condition; After the label of standby condition is received select command, enter status recognition, carry out the label collision recognition; Receive that read command enters the exchanges data state and carries out data access; If receive the data read command, then enter the exchanges data state and carry out data access at the label that status recognition is correctly validated; After visit was finished, label returned standby condition.
The inventor finds that there is following problem at least in prior art: existing radio-frequency recognition system does not have security mechanism preferably, can't effectively resist illegal communication.
Summary of the invention
The object of the present invention is to provide a kind of radio-frequency recognition system, read write line, label and communication means, to solve the relatively poor problem of security that prior art exists.
On the one hand, the embodiment of the invention provides a kind of communication means of radio-frequency recognition system, and described method comprises: detect the label that enters radio frequency electromagnetic field; Wherein, if enter the radio listening silence password non-zero that the label of radio frequency electromagnetic field itself prestores, described label enters the radio listening silence state; The password that wakes up that sends non-zero to described label wakes described label up, and described label is changed over to ready state from the radio listening silence state, and the described value of waking password up is consistent with the radio listening silence password of label itself.
On the other hand, the embodiment of the invention provides the communication means of another kind of radio-frequency recognition system, and described method comprises: after the label that prestores the radio listening silence password of non-zero enters radio frequency electromagnetic field, enter the radio listening silence state; Receive the password that wakes up of non-zero that described read write line sends, change over to ready state from the radio listening silence state, the radio listening silence password that the described value and label of waking password up itself prestores is consistent.
Another aspect, the embodiment of the invention provide the read write line in a kind of radio-frequency recognition system, and described read write line comprises: detecting unit is used to detect the label that enters radio frequency electromagnetic field; Transmitting element is used for waking described label up to the password that wakes up of described label transmission non-zero, and described label is changed over to ready state from the radio listening silence state, and wherein, the radio listening silence password that the described value and label of waking password up itself prestores is consistent.
Another aspect, the embodiment of the invention provides the label in a kind of radio-frequency recognition system, described label itself prestores the radio listening silence password of non-zero, when entering radio frequency electromagnetic field, described label is in the radio listening silence state, wherein, described label comprises: receiving element, be used to receive the password that wakes up of non-zero that read write line sends, and the radio listening silence password that the described value and label of waking password up itself prestores is consistent; State conversion unit is used for the password that wakes up according to non-zero, and described label is changed over to ready state from the radio listening silence state.
Another aspect, the embodiment of the invention provide a kind of radio-frequency recognition system, and described system comprises: label and read write line, and described read write line is used to detect the label that enters radio frequency electromagnetic field; The password that wakes up that sends non-zero to described label wakes described label up, and described label is changed over to ready state from the radio listening silence state; Wherein, the radio listening silence password that prestores of the described value and label of waking password up itself is consistent; Described label enters after the radio frequency electromagnetic field, if the radio listening silence password non-zero that itself prestores, described label enters the radio listening silence state; And when receive the consistent non-zero of value that this read write line sends with described radio listening silence password wake password up the time, be waken up to change over to ready state from the radio listening silence state.
The technique scheme that the embodiment of the invention provides; label enters after the radio frequency electromagnetic field; if the radio listening silence password non-zero that prestores itself; described label enters the radio listening silence state; label does not respond and checks order when being in the radio listening silence state, thereby has protected the unique identifying information of label to be illegally accessed effectively.And the label that is in the radio listening silence state has only when receiving when effectively waking password up; just be waken up to change over to ready state from the radio listening silence state; so that carry out the follow-up process of checking; realized like this adopting the radio listening silence password to protect the unique identifying information of label; not corresponding or be complementary wake password up; just can't check label; thereby can't obtain the unique identifying information of label; improved the security of visit like this, can effectively resist illegal communication.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the tag state transition diagram in the EPC agreement of prior art;
Fig. 2 is the tag state transition diagram in the ISO18000-6B agreement of prior art;
Fig. 3 is the process flow diagram of communication means of a kind of radio-frequency recognition system of the embodiment of the invention;
Fig. 4 is the process flow diagram of communication means of the another kind of radio-frequency recognition system of the embodiment of the invention;
Fig. 5 is the functional block diagram of the read write line in a kind of radio-frequency recognition system of the embodiment of the invention;
Fig. 6 is the functional block diagram of the label in a kind of radio-frequency recognition system of the embodiment of the invention;
Fig. 7 is the tag state transition diagram in the radio-frequency recognition system of the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 3 is the process flow diagram of communication means of a kind of radio-frequency recognition system of the embodiment of the invention.As shown in Figure 3, the executive agent of this method is the read write line in this radio-frequency recognition system, and this method comprises the steps:
In embodiments of the present invention, the radio listening silence password is consistent with waking password up, and its effect is after label carries out silent status, and label is waken up, is transformed into ready state.
The radio listening silence password can be pre-stored in the label, when label is in silent status, wait for the order of reader/read write line, if in the order of reader to wake password up consistent with the radio listening silence password of label itself, then label is waken up, jump to ready state, otherwise label keeps silent status.
For example the password of label own is 5, if the password that wakes up that reader sends is 5, label jumps to ready state so; If wake password up is 4, and label is just ignored this order so, keeps silent status.
Preferably, above-mentioned password can be a string number, for example adopts the 32bit number.
Alternatively, method shown in Figure 3 can further include step: when above-mentioned label was in the affirmation state, the authentication key to above-mentioned label transmission random number request instruction and non-zero changed to the discriminating state above-mentioned label over to; The random number of returning according to above-mentioned label, and carry out identity between the above-mentioned label and differentiate; When differentiating successfully, make above-mentioned label from the discriminating state change over to open state so that above-mentioned label is conducted interviews.
Alternatively, method shown in Figure 3 can further include step: when above-mentioned label was in the affirmation state, sending the random number request instruction to above-mentioned label was zero authentication key with value, and above-mentioned label is changed over to open state from the affirmation state.
Alternatively, method shown in Figure 3 can further include step: when the above-mentioned label that is in open state comprises a plurality of tag storage district that the secure access password has nothing in common with each other, send the secure access password of expecting a tag storage district of visit in above-mentioned a plurality of tag storage district to above-mentioned label, above-mentioned label is changed over to safe condition from open state, conduct interviews with a tag storage district to above-mentioned expectation visit.Because there is different access passwords in different tag storage districts, thereby can guarantee that different users can't read the information of other memory blocks, make different user visit different memory areas like this, each user has memory block and password separately, and is more convenient to using like this.Each user has only the authority of the memory block of visit oneself, and does not have the authority in other tag storage district of visit.
In embodiments of the present invention, the state of the label of this radio-frequency recognition system preferably comprises: radio listening silence state, ready state, arbitrate state, response status, affirmation state, discriminating state, open state, safe condition and inactivated state.Read write line wakes label up by the correct password that wakes up, checks in arbitrate state afterwards, obtains the random number that label generates; Read write line is differentiated label according to random number then, confirms that the legal back of identity conducts interviews to label, adopts access password to guarantee access rights in the visit.Because in the whole state flow process of the embodiment of the invention, used arbitrary or combination in any in radio listening silence password, access password and the safe authentication scheme to guarantee the security of idle port communication, solved the relatively poor problem of security that prior art exists, at different safety problems, adopt multiple safety approach.
In embodiments of the present invention,, adopt the radio listening silence password to protect, do not have the correct password that wakes up, then can't check, thereby can't obtain the unique identifying information of label label for the unique identifier information of label; For the authentication of label and read write line, adopted safe authentication scheme to guarantee the affirmation of both sides' identity, prevent the visit of illegal identity; For the control of different access authority, by realizing for different tag storage districts is provided with the access password that has nothing in common with each other.Can also guarantee that tag state normally shifts, the situation of state machine endless loop can not occur, improve the security of visit simultaneously.
Fig. 4 is the process flow diagram of communication means of the another kind of radio-frequency recognition system of the embodiment of the invention.As shown in Figure 4, the executive agent of this method is the label in the radio-frequency recognition system, and this method comprises the steps:
After step 201, the label that prestores the radio listening silence password of non-zero enter radio frequency electromagnetic field, enter the radio listening silence state;
Particularly, label enters after the radio frequency electromagnetic field, if the radio listening silence password non-zero that itself prestores, described label enters the radio listening silence state.
Alternatively, method shown in Figure 4 can further include step: when being in the affirmation state, receive the random number request instruction of above-mentioned read write line transmission and the authentication key of non-zero, change over to the discriminating state from the affirmation state; Generate the identifier of random number according to above-mentioned random number request instruction, carry out identity between label and the above-mentioned read write line and differentiate as tag access; When differentiating successfully, from the discriminating state change over to open state to allow the visit of above-mentioned read write line.
Alternatively, method shown in Figure 4 can further include step: when being in the affirmation state, the random number request instruction and the value that receive above-mentioned read write line transmission are zero authentication key, change over to open state from the affirmation state.
Alternatively, method shown in Figure 4 can further include step: when having a plurality of tag storage district that the secure access password has nothing in common with each other, whether the secure access password at a tag storage district wherein of judging that above-mentioned read write line sends is correct, when judged result when being, change over to safe condition from open state, the respective labels memory block of its expectation visit is conducted interviews to allow above-mentioned read write line.
Fig. 5 is the functional block diagram of the read write line in a kind of radio-frequency recognition system of the embodiment of the invention.As shown in Figure 5, this read write line comprises:
Detecting unit 301 is used to detect the label that enters radio frequency electromagnetic field; Wherein, if enter the radio listening silence password non-zero that the label of radio frequency electromagnetic field itself prestores, described label enters the radio listening silence state;
Transmitting element 302 is used for waking above-mentioned label up to the password that wakes up of label transmission non-zero, and above-mentioned label is changed over to ready state from the radio listening silence state.The described value of waking password up is consistent with the radio listening silence password of label itself.
Alternatively, transmitting element 302 can also be used for when above-mentioned label is in the affirmation state, and the authentication key to above-mentioned label transmission random number request instruction and non-zero changes to the discriminating state above-mentioned label over to;
Alternatively, this read write line can also comprise: discriminating unit 303 is used for the random number returned according to this label, and carries out identity between this label and differentiate; And addressed location 304, be used for when differentiating successfully, make this label change over to open state so that this label is conducted interviews.
Alternatively, transmitting element 302 can also be used for when above-mentioned label is in the affirmation state, and sending the random number request instruction to above-mentioned label is zero authentication key with value, and above-mentioned label is changed over to open state.
Alternatively, transmitting element 302, can also be used for when the above-mentioned label that is in open state comprises a plurality of tag storage district that the secure access password has nothing in common with each other, send the secure access password of expecting a tag storage district of visit in described a plurality of tag storage district to above-mentioned label, above-mentioned label is changed over to safe condition, so that the tag storage district that above-mentioned addressed location is visited above-mentioned expectation conducts interviews from open state.
Fig. 6 is the functional block diagram of the label in a kind of radio-frequency recognition system of the embodiment of the invention.As shown in Figure 6, this label itself prestores the radio listening silence password of non-zero, is in the radio listening silence state when this label enters radio frequency electromagnetic field, perhaps, if the radio listening silence password that this label itself prestores is zero, when entering radio frequency electromagnetic field, this label is in ready state; Wherein, this label comprises:
Receiving element 401 is used to receive the password that wakes up of non-zero that read write line sends, and the radio listening silence password that the described value and label of waking password up itself prestores is consistent;
Alternatively, receiving element 401 can also be used for when above-mentioned label is in the affirmation state, receives the random number request instruction of above-mentioned read write line transmission and the authentication key of non-zero; State conversion unit 402 also is used for the state of above-mentioned label is changed over to the discriminating state from the affirmation state; Above-mentioned label also comprises: discriminating unit 403 is used for generating random number according to above-mentioned random number request instruction, and makes and carry out the identity discriminating between above-mentioned label and the above-mentioned read write line;
Alternatively, state conversion unit 402 can also be used for when differentiating successfully, with the state of above-mentioned label from the discriminating state change over to open state to allow the visit of above-mentioned read write line.
Alternatively, receiving element 401 also is used for when above-mentioned label is in the affirmation state, and the random number request instruction and the value that receive above-mentioned read write line transmission are zero authentication key; State conversion unit 402 also is used for the state of above-mentioned label is changed over to open state from the affirmation state.
Alternatively, this label also comprises: judging unit 404, be used for when having a plurality of tag storage district that the secure access password has nothing in common with each other, and whether the secure access password at a tag storage district wherein of judging that above-mentioned read write line sends is correct; State conversion unit 402, can also be used for when the judged result of judging unit 404 when being, the state of above-mentioned label is changed over to safe condition from open state, to allow above-mentioned read write line an above-mentioned wherein tag storage district is conducted interviews.
Below with reference to the accompanying drawings and in conjunction with the embodiments, said method, read write line and label are elaborated.
Fig. 7 is the tag state transition diagram of the radio-frequency recognition system of the preferred embodiment of the present invention.As shown in Figure 7, the state of the label of this radio-frequency recognition system comprises: radio listening silence state, ready state, arbitrate state, response status, affirmation state, discriminating state, open state, safe condition and inactivated state, and the state transitions process of label is as follows:
1, after label enters radio frequency electromagnetic field,, then enters " radio listening silence " state if the label radio listening silence password of deactivation is not non-vanishing; If the radio listening silence password is zero, then directly enter ready state.The label that is in " radio listening silence " state only responds the wake command of read write line, if wake command is effective, also promptly wakes password match up, then jumps to " ready " state.
2, the configuration of not mourning in silence after powering on, or the label that has been waken up enters ready state.
Receive and check order Query if 3, be in the label of ready state, and, then enter arbitrate state, carry out anticollision counting when the making an inventory during tag match of this label; When the sign of making an inventory of this label does not match, then remain on ready state.
4, in the process of checking, the label that meets the condition of replying jumps to response status, and the random number of backscatter tag, and label uses random number as identifier.Particularly, the condition of replying comprises: counter＞0, and make an inventory and the SL tag match.
5, after label is replied successfully, care label is by simplification, and read write line sends confirms order, makes label enter the affirmation state, and read write line can obtain to be checked the unique identifying information of label in the affirmation state.Particularly, this unique identifying information can adopt existing EPC coding, also can be with other article code.
6, in the affirmation state, after the unique identifying information of label is successfully read, read write line sends random number request instruction (RN_req), this moment, label carried out safe discriminating if desired, promptly non-0 the time when authentication key, then change the discriminating state over to, otherwise when authentication key is 0, change open state over to, wait to be visited.
7, finish unidirectional or two-way discriminating to confirm both sides' identity at the labeling requirement and the read write line of the state of discriminating, concrete identification flow can be selected according to different demands for security.Differentiate that successful label jumps to open state and conducts interviews, the label of failure jumps to ready state, does not allow accessed.
8, the label at open state can respond general reading and writing, lock, kills order, does not have the tag storage of password district but can only correctly visit, and has the tag storage district of access password normally not visit under open state.One or more tag storage district can be set when label is initialized.
9, when read write line will be visited the tag storage district of password, should be by the secure access order, behind the authentication-access password, label can normally be visited after jumping to safe condition, comprises orders such as reading and writing, lock.
10, under open state and the safe condition label receive password correct kill order, promptly change inactivated state over to, label under the inactivated state remains at inactivated state, and enters inactivated state immediately when powering on afterwards, and response is not done in the order of all read write lines.
As can be seen from the above description, the embodiment of the invention has realized following technique effect: because multiple label secure access mode is provided, comprise radio listening silence password, deactivation password, memory block access password, authentication key, solve the lower problem of security that prior art exists, can realize the secure communication of read write line and label.
Those of ordinary skills can recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (17)
1. the communication means of a radio-frequency recognition system is characterized in that, described method comprises:
Detection enters the label of radio frequency electromagnetic field; Wherein, if enter the radio listening silence password non-zero that the label of radio frequency electromagnetic field itself prestores, described label enters the radio listening silence state;
The password that wakes up that sends non-zero to described label wakes described label up, and described label is changed over to ready state from the radio listening silence state, and described radio listening silence password is consistent with the described value of waking password up.
2. method according to claim 1 is characterized in that, described method also comprises:
When described label was in the affirmation state, the authentication key to described label transmission random number request instruction and non-zero changed to the discriminating state described label over to;
The random number of returning according to described label, and carry out identity between the described label and differentiate;
When differentiating successfully, make described label from the discriminating state change over to open state so that described label is conducted interviews.
3. method according to claim 1 is characterized in that, described method also comprises:
When described label was in the affirmation state, sending the random number request instruction to described label was zero authentication key with value, and described label is changed over to open state from the affirmation state.
4. according to claim 2 or 3 described methods, it is characterized in that described method also comprises:
When the described label that is in open state comprises a plurality of tag storage district that the secure access password has nothing in common with each other, send the secure access password of expecting a tag storage district of visit in described a plurality of tag storage district to described label, described label is changed over to safe condition from open state, conduct interviews with a tag storage district to described expectation visit.
5. the communication means of a radio-frequency recognition system is characterized in that, described method comprises:
After the label that prestores the radio listening silence password of non-zero enters radio frequency electromagnetic field, enter the radio listening silence state;
Receive the password that wakes up of non-zero that read write line sends, change over to ready state from the radio listening silence state, the radio listening silence password that the described value and label of waking password up itself prestores is consistent.
6. method according to claim 5 is characterized in that, described method also comprises:
When being in the affirmation state, receive the random number request instruction of described read write line transmission and the authentication key of non-zero, change over to the discriminating state from the affirmation state;
Generate random number with identifier according to described random number request instruction as tag access, and and described read write line between carry out identity and differentiate;
When differentiating successfully, from the discriminating state change over to open state to allow the visit of described read write line.
7. method according to claim 5 is characterized in that, described method also comprises:
When being in the affirmation state, the random number request instruction and the value that receive described read write line transmission are zero authentication key, change over to open state from the affirmation state.
8. according to claim 6 or 7 described methods, it is characterized in that described method also comprises:
When having a plurality of tag storage district that the secure access password has nothing in common with each other, whether the secure access password at a tag storage district wherein of judging that described read write line sends is correct, when judged result when being, change over to safe condition from open state, a described wherein tag storage district is conducted interviews to allow described read write line.
9. the read write line in the radio-frequency recognition system is characterized in that described read write line comprises:
Detecting unit is used to detect the label that enters radio frequency electromagnetic field; Wherein, if enter the radio listening silence password non-zero that the label of radio frequency electromagnetic field itself prestores, described label enters the radio listening silence state;
Transmitting element, the password that wakes up that is used for described label transmission non-zero wakes described label up, and described label is changed over to ready state from the radio listening silence state; Wherein, the radio listening silence password that prestores of the described value and label of waking password up itself is consistent.
10. read write line according to claim 9 is characterized in that, described transmitting element also is used for when described label is in the affirmation state, and the authentication key to described label transmission random number request instruction and non-zero changes to the discriminating state described label over to;
Described read write line also comprises: discriminating unit is used for the random number returned according to described label, and carries out identity between the described label and differentiate; And addressed location, be used for when differentiating successfully, make described label change over to open state so that described label is conducted interviews.
11. read write line according to claim 9 is characterized in that, described transmitting element also is used for when described label is in the affirmation state, and sending the random number request instruction to described label is zero authentication key with value, and described label is changed over to open state.
12. according to claim 10 or 11 described read write lines, it is characterized in that, described transmitting element, also be used for when the described label that is in open state comprises a plurality of tag storage district that the secure access password has nothing in common with each other, send the secure access password of expecting a tag storage district of visit in described a plurality of tag storage district to described label, described label is changed over to safe condition, so that the tag storage district that described addressed location is visited described expectation conducts interviews from open state.
13. the label in the radio-frequency recognition system is characterized in that described label itself prestores the radio listening silence password of non-zero, is in the radio listening silence state when described label enters radio frequency electromagnetic field, wherein, described label comprises:
Receiving element is used to receive the password that wakes up of non-zero that read write line sends, and the radio listening silence password that the described value and label of waking password up itself prestores is consistent;
State conversion unit is used for the password that wakes up according to described non-zero, and described label is changed over to ready state from the radio listening silence state.
14. label according to claim 13 is characterized in that,
Described receiving element also is used for when described label is in the affirmation state, receives the random number request instruction of described read write line transmission and the authentication key of non-zero;
Described state conversion unit also is used for the state of described label is changed over to the discriminating state from the affirmation state;
Described label also comprises: discriminating unit is used for generating random number according to described random number request instruction, and makes and carry out the identity discriminating between described label and the described read write line;
Described state conversion unit also is used for when differentiating successfully, with the state of described label from the discriminating state change over to open state to allow the visit of described read write line.
15. label according to claim 13 is characterized in that,
Described receiving element also is used for when described label is in the affirmation state, and the random number request instruction and the value that receive described read write line transmission are zero authentication key;
Described state conversion unit also is used for the state of described label is changed over to open state from the affirmation state.
16. according to claim 14 or 15 described labels, it is characterized in that, described label also comprises: judging unit, be used for when having a plurality of tag storage district that the secure access password has nothing in common with each other, whether the secure access password at a tag storage district wherein of judging that described read write line sends is correct;
Described state conversion unit, also be used for when the judged result of described judging unit when being, the state of described label is changed over to safe condition from open state, to allow described read write line a described wherein tag storage district is conducted interviews.
17. a radio-frequency recognition system comprises label and read write line, it is characterized in that,
Described read write line is used to detect the label that enters radio frequency electromagnetic field; The password that wakes up that sends non-zero to described label wakes described label up, and described label is changed over to ready state from the radio listening silence state; Wherein, the radio listening silence password that prestores of the described value and label of waking password up itself is consistent;
Described label, if be used for radio listening silence password non-zero itself that prestore, described label enters the radio listening silence state; And when receive the consistent non-zero of value that described read write line sends with described radio listening silence password wake password up the time, be waken up to change over to ready state from the radio listening silence state.
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