CN100592330C - Identification system using mechanical vibrations on identifier - Google Patents
Identification system using mechanical vibrations on identifier Download PDFInfo
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- CN100592330C CN100592330C CN200580014190A CN200580014190A CN100592330C CN 100592330 C CN100592330 C CN 100592330C CN 200580014190 A CN200580014190 A CN 200580014190A CN 200580014190 A CN200580014190 A CN 200580014190A CN 100592330 C CN100592330 C CN 100592330C
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Abstract
The invention relates to an identification system, wherein the identifier is a body comprising an inhomogeneous material, which body is identified by subjecting it to mechanical vibrations, in particular acoustic vibrations, observing how the propagation of this mechanical vibrations is affected by inhomogeneities present in the body, and recognizing the body on the basis of a previous observation. Such an identifier body can be associated with an information carrier, allowing for the authentication of the information carrier, and for a conditional access or a copy protection scheme which canbe relied upon. The acoustic identification according to the invention can be seen as an alternative to the optical identification of a body, which is known in the art, which alternative, compared tothe optical identification, is characterized by higher robustness, various simplifications in the identification system and lower costs of implementation. The invention can also be applied for the generation of keys.
Description
Technical field
The present invention relates to a kind of recognition system, a kind of device of identification marking symbol main body, a kind of identifier device, a kind of information carrier and a kind of method that is used for identification marking symbol main body of being used for.The invention further relates to a kind of key generation system, a kind of device that is used for generating key, and a kind of method that is used for generating key by the identifier main body by the identifier main body.
Background technology
An embodiment in the recognition system of type described in the beginning section can know from US-6584214, in view of the above the three-dimensional character of complicated physical arrangement is used for function and discerns this structure.Physical arrangement can be the mark of uneven material; the polymeric matrix that for example comprises permanent particles suspended or bubble, and it can be with illuminating in light beam so that speckle pattarn can detect by being positioned at the photoelectric detector that suitably is provided with respect to radiation source and mark.Speckle pattarn depends on the internal microstructure of mark and depends on incident radiation, and represents replying of physical arrangement thus, promptly to the physical function of incident radiation, i.e. and the problem of Ti Chuing.
All there is very big difficulty owing to physically clone physical arrangement and even only construct its mathematical model, so this structure is suitable for being used as the identifier main body in the recognition system.Such identifier main body can be embedded in the project or with project and is associated, and credit card for example is to be easy to its authentication.Specifically, when this project has been used, before the use that starts it, carries out verification step and replying with expectation of being obtained replied comparison during identifier is by inquiry, described expected response is to collect at so-called registration phase in advance.
A shortcoming of known system is, it comprises the detection of replying of relative complex, especially needs to use photoelectric detector, and it is complexity and expensive component.
Summary of the invention
First purpose of the present invention is to provide a kind of recognition system, and it provides the simple relatively identification to the identifier main body.
Second purpose of the present invention is to provide a kind of device that is used for identification marking symbol main body, and it provides the simple relatively identification to this identifier main body.
The 3rd purpose of the present invention is to provide a kind of identifier device, and it can be discerned by simple relatively device.
The 4th purpose of the present invention is to provide a kind of information carrier, and it can be by simple relatively device identification.
The 5th purpose of the present invention is: a kind of method that is used for identification marking symbol main body is provided, and it provides the simple relatively identification to the identifier main body.
The 6th purpose of the present invention is to provide a kind of key generation system, and it provides simple relatively key to generate.
The 7th purpose of the present invention is to provide a kind of device that is used for being generated by the identifier main body key, and it provides simple relatively key to generate.
The 8th purpose of the present invention is to provide a kind of method that is used for being generated by the identifier main body key, and it provides simple relatively key to generate.
First purpose of the present invention realizes that by a kind of recognition system this system comprises:
The identifier main body is used for producing when utilization is inquired and replys;
Inquiry unit is used for utilizing and inquires the identifier main body, and wherein inquiry unit can apply first mechanical vibration as inquiry, and it transmits to produce second mechanical vibration;
Detecting unit is used for detecting and replys, and is wherein represented to reply by second mechanical vibration; And
Check the unit, be used for relatively replying and authorization information, this authorization information is replied relevant with expectation, it is characterized in that, described identifier main body comprises unevenness or the layer that is combined by irregular surface of contact by different materials, so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
The present invention is based on the neodoxy to the transmission of mechanical vibration in the main body.
The experiment of being undertaken by the inventor shows: the three-dimensional character that comprises the main body of uneven anisotropic material, for example as the mark of the polymeric matrix that comprises unevenness, directly influence the transmission of mechanical vibration in the mode that reflects described three-dimensional character uniquely, for example as quantity, size, shape and the position of this unevenness.Make main body stand mechanical vibration, and observe the transmission of the mechanical vibration in first example, the transmission by observing the mechanical vibration that produce the same terms is under once more also compared it and to be provided the main body in second example to discern with previous observation.
Therefore these experiments show: this main body is applicable to as identifier in the recognition system or identifier main body, because its some attribute makes it be different from other main body and is identified.Obviously, because same this main body of reason can also be used to generate keys for encryption/decryption, unique identification number or random number.Inquiring the identifier main body by the identifier main body is applied first mechanical vibration, is owing to transmit second mechanical vibration of generation by first mechanical vibration of identifier main body though reply.Detection is replied then and it to be replied relevant authorization information with expectation is compared, and replying when promptly being desirably in the inquiry identifier main body based on previous observation so that identification marking symbol main body, just distinguished it and different subjects.
Recognition system according to the present invention provides a kind of simple identification to the identifier main body, and especially the recognition system based on optical identification than known is simple.In fact, inquiry unit and detecting unit all be easy to realize, because for example generate mechanical vibration vice versa the parts that all need to use such as transducer by electric signal, these parts are simple and can have bought cheaply on market.Can need not to use to resemble the photoelectric detector of in known recognition system, using, make and all simplify to some extent in the mechanical aspects of installing with aspect the processing of replying that detects.Another advantage is: that limits in the known recognition system of ratio that inquiry unit and the detecting unit tolerance deviation relevant with respect to the mechanical registeration of identifier main body limits in recognition system according to the present invention is less relatively, mainly is because the wavelength of the frequency that comprises is longer.
Preferably, inquiry unit can be applied to first mechanical vibration on first of identifier main body, is sent to second point of identifier main body from here, and detecting unit can detect second mechanical vibration on second of identifier main body.
In one embodiment, inquiry unit can also provide one group of inquiry, and the inquiry of inquiry group causes replying separately; Authorization information also with expected each reply relevant; Checking the unit can also compare each and reply and authorization information.Particularly, provide a plurality of inquiries, these surveyingpins are to strengthening the security of recognition system.In fact, though the assailant can attempt to see replying of producing when identifier during the Qualify Phase is inquired, and attempt to cheat recognition system at Qualify Phase afterwards based on these observations, but along with the increase of the inquiry number that can generate and be used for this sign, the difficulty of doing so also increases thereupon.The utilizability of a plurality of inquiries has been developed the possibility of a plurality of realization Qualify Phases, and it can be predicted and use one, a plurality of or inquiry that all are available.If use one or inquiry that some is available, be preferably so and can select these inquiries randomly or in any non-repetitive mode, with in addition further improve the difficulty of attacking.
Above-mentioned recognition system has also adopted the other advantage according to recognition system of the present invention, and described advantage is to pass through solid material because mechanical vibration transmit relatively slowly, and it is intrinsic low answering system.Low answering system makes that the assailant is difficult to attempt by observing replying of all possibility inquiries cheated recognition system, as briefly not describing in the disclosed european patent application 03104226.0 and 03103931.6 (being respectively PHNL031345 and PHNL031296) before.
In a preferred embodiment, inquiry unit can also generate the periodic mechanical vibration with frequency, amplitude and waveform, and in this frequency, amplitude and the waveform at least one is variable parameter.This embodiment provide according to of the present invention, have a plurality of inquiries and first possibility of the recognition system of replying separately, can generate the mechanical vibration of different cycles in view of the above.
Specifically, employed frequency can be in the range of audibility of frequency, provides easy acquisition and simple audio-frequency transducer as transducer.
In another embodiment, at least one in first and second is variable.Second possibility also can be used in conjunction with first possibility.In fact, at least one in changing at first and second has and changes the effect of replying that obtains, thus effectively tag application different inquiries.
Recognition system according to the present invention may further include the information carrier that is coupled to the identifier main body and is used for the device of visit information carrier.The identifier main body can be used to verify the information carrier that is coupled to the identifier main body in the case, therefore allows realization condition visit and/or copy protection schemes.Specifically, the identifier main body can embed in the information carrier; As selection, information carrier self can be regarded the identifier main body.
In one embodiment, inquiry unit and detecting unit are included in the device that is used for identification marking symbol main body.
In another embodiment, substitute a last embodiment, inquiry unit comprises:
First transducer is used to send first mechanical vibration; And
The first transducer control module is used to control first transducer; And
Detecting unit comprises:
Second transducer is used to detect second mechanical vibration; And
The second transducer control module is used to control second transducer; And
The first transducer control module and the second transducer control module are included in the device that is used for identification marking symbol main body, and first transducer, second transducer and identifier main body constitute identifier device.These systems are especially firm, because such fact: transducer uses together with the identifier main body in the identifier device, fixed position in the identifier main body constantly generates/detects first and second vibrations, thereby allows in the mechanical aspects of recognition system even simplification further.The identifier main body requirement of mechanical registeration inquiry unit and detecting unit accurately is present in the known recognition system, and can fully overcome according to this embodiment.
Among two embodiment, the device that is used for the identification marking symbol can also comprise checks the unit in the above; As selection, check the unit and can be in the remote computer that can be connected to this device, perhaps can be distributed between device and the remote computer.
In addition, authorization information can be stored in the information carrier, be present in the storer of checking in the unit, perhaps be present in the remote data base that can be connected to the device that is used for identification marking symbol, all be best suited for according to the type of information carrier and each this possibility of intended purpose.As the measurement of further raising security level, authorization information can also be distributed in information carrier, be present among the storer checked in the unit and remote data base at least two.
In the above among two embodiment, comprising the information carrier that is coupled to the identifier main body, with the device that is used for the visit information carrier, being used for the device of identification marking symbol main body and being used for the device of visit information carrier can be integrated each other, makes single assembly both can be used for identification marking symbol main body and also can be used for the visit information carrier.
When using aforesaid recognition system, comprise additional transducers by in inquiry unit and detecting unit at least one, can realize changing and/or thought easily at first at second.At least one of inquiry unit and detecting unit comprises additional transducers in this embodiment; Therefore can expand inquiry number and replying afterwards by starting different transducers selectively.In addition, perhaps as selecting the function that first transducer and second transducer can exchange them, promptly, second transducer also is suitable for sending first mechanical vibration, and first transducer also is suitable for detecting second mechanical vibration, and it has the inquiry of expansion number and the effect of replying afterwards equally.
According to the present invention, second purpose is to realize that by a kind of device that is used for identification marking symbol main body wherein the generation of identifier main body is replied when utilization is inquired, described device comprises:
The first transducer control module is used to control first transducer inquiry is applied to the identifier main body, and wherein first transducer is applicable to and sends first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
The second transducer control module is used to control second transducer and detects and reply, and wherein replys by second mechanical vibration and represents; And
Check the unit, be used for relatively replying and authorization information, it is relevant that this authorization information and expectation are replied,
It is characterized in that, described identifier main body comprises unevenness or the layer that is combined by irregular surface of contact by different materials, so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely, this is conspicuous from above-mentioned discussion.If the identifier main body is not included in the identifier device with first transducer and second transducer, first transducer and second transducer can be incorporated into respectively in the inquiry unit and detecting unit of this equipment so.
According to the present invention, the 3rd purpose is to realize by a kind of identifier device of identifier main body that comprises.This identifier main body is used for producing when utilization is inquired replys, and this identifier device also comprises:
First transducer is used to send first mechanical vibration, and its transmission is so that produce second mechanical vibration; And
Second transducer is used to detect second mechanical vibration,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to the present invention, the 4th purpose is to realize by a kind of information carrier of aforesaid identifier device that comprises.
In a preferred embodiment, identifier device may further include at least one additional transducers or wherein second transducer also be suitable for sending first mechanical vibration, and first transducer also is suitable for detecting second mechanical vibration.
According to the present invention, the 5th purpose is to realize by a kind of method that is used for identification marking symbol main body, and this identifier main body is used for producing when utilization is inquired replys, and this method comprises:
The inquiry step utilizes inquiry the identifier main body to be inquired described inquiry is first mechanical vibration of sending during inquiring, its transmission is so that produce second mechanical vibration;
Detect step, detect between detection period and reply, described replying by second mechanical vibration represented; And
Checking step will be replied with authorization information during checking and be compared, and it is relevant that this authorization information and expectation are replied,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to the present invention, the 6th purpose realizes by a kind of key generation system, comprising:
The identifier main body is used for producing when utilization is inquired and replys;
Inquiry unit is used for utilizing inquiry the identifier main body to be inquired wherein inquiry unit can apply first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
Detecting unit is used for detecting and replys, and wherein said replying by second mechanical vibration represented; And
Cipher key extraction unit is used for extracting key from replying,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to the present invention, the 7th purpose is to realize from the device of identifier main body generation key that by a kind of being used for wherein the generation of identifier main body is replied when utilization is inquired, described device comprises:
The first transducer control module is used to control first transducer inquiry is applied to the identifier main body, and wherein first transducer is applicable to and sends first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
The second transducer control module is used to control second transducer and replys with detection, and wherein this is replied by second mechanical vibration and represents; And
Cipher key extraction unit is used for extracting key from replying,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to the present invention, the 8th purpose is to realize that from the method for identifier main body generation key this identifier main body produces and replys when utilization is inquired by a kind of being used for, and described method comprises:
The inquiry step utilizes inquiry the identifier main body to be inquired described inquiry is first mechanical vibration of sending during inquiring, its transmission is so that produce second mechanical vibration;
Detect step, detect between detection period and reply, described replying by second mechanical vibration represented; And
Cipher key extraction step, during milking key extracts from reply,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to an aspect of the present invention, provide a kind of recognition system, having comprised:
The identifier main body is used for producing when utilization is inquired and replys;
Inquiry unit is used for utilizing and inquires the identifier main body, and wherein inquiry unit can apply first mechanical vibration as inquiry, and it transmits to produce second mechanical vibration;
Detecting unit is used for detecting and replys, and is wherein represented to reply by second mechanical vibration; And
Check the unit, be used for relatively replying and authorization information, this authorization information is replied relevant with expectation, it is characterized in that, described identifier main body comprises unevenness or the layer that is combined by irregular surface of contact by different materials, so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to another aspect of the present invention, also provide a kind of device that is used for identification marking symbol main body, wherein the generation of identifier main body is replied when utilization is inquired, described device comprises:
The first transducer control module is used to control first transducer inquiry is applied to the identifier main body, and wherein first transducer is applicable to and sends first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
The second transducer control module is used to control second transducer and detects and reply, and wherein replys by second mechanical vibration and represents; And
Check the unit, be used for relatively replying and authorization information, it is relevant that this authorization information and expectation are replied,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to another aspect of the present invention, also provide a kind of identifier device that comprises the identifier main body, this identifier main body is used for producing when utilization is inquired replys, and this identifier device also comprises:
First transducer is used to send first mechanical vibration, and its transmission is so that produce second mechanical vibration; And
Second transducer is used to detect second mechanical vibration,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to another aspect of the present invention, also provide a kind of information carrier that comprises aforesaid identifier device.
According to another aspect of the present invention, also provide a kind of method that is used for identification marking symbol main body, this identifier main body is used for producing when utilization is inquired replys, and this method comprises:
The inquiry step utilizes inquiry the identifier main body to be inquired described inquiry is first mechanical vibration of sending during inquiring, its transmission is so that produce second mechanical vibration;
Detect step, detect between detection period and reply, described replying by second mechanical vibration represented; And
Checking step will be replied with authorization information during checking and be compared, and it is relevant that this authorization information and expectation are replied,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to another aspect of the present invention, also provide a kind of key generation system, having comprised:
The identifier main body is used for producing when utilization is inquired and replys;
Inquiry unit is used for utilizing inquiry the identifier main body to be inquired wherein inquiry unit can apply first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
Detecting unit is used for detecting and replys, and wherein said replying by second mechanical vibration represented; And
Cipher key extraction unit is used for extracting key from replying,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to another aspect of the present invention, also provide a kind of device that is used for generating from the identifier main body key, wherein the generation of identifier main body is replied when utilization is inquired, described device comprises:
The first transducer control module is used to control first transducer inquiry is applied to the identifier main body, and wherein first transducer is applicable to and sends first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
The second transducer control module is used to control second transducer and replys with detection, and wherein this is replied by second mechanical vibration and represents; And
Cipher key extraction unit is used for extracting key from replying,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
According to another aspect of the present invention, also provide a kind of method that is used for generating from the identifier main body key, this identifier main body produces and replys when utilization is inquired, described method comprises:
The inquiry step utilizes inquiry the identifier main body to be inquired described inquiry is first mechanical vibration of sending during inquiring, its transmission is so that produce second mechanical vibration;
Detect step, detect between detection period and reply, described replying by second mechanical vibration represented; And
Cipher key extraction step, during milking key extracts from reply,
It is characterized in that, described identifier main body comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body uniquely.
Description of drawings
Further illustrate and describe these and others below with reference to accompanying drawings according to recognition system of the present invention, device, identifier device, information carrier and method.In the accompanying drawings:
Fig. 1 shows first embodiment according to recognition system of the present invention,
Fig. 2 a and 2b show different identification symbol main body and the replying separately of generation when utilize identical challenges that they are inquired,
Fig. 3 a shows the attribute of identifier main body as physical function,
Fig. 3 b shows the enforcement authorization information and is intended to utilize it to come information carrier is carried out safety verification,
Fig. 4 shows second embodiment according to recognition system of the present invention, and information carrier is implemented checking,
Fig. 5 shows the 3rd embodiment according to recognition system of the present invention, to information carrier realization condition access scheme,
Fig. 6 shows the 4th embodiment according to recognition system of the present invention, and information carrier is realized copy protection schemes,
Fig. 7 shows the 5th embodiment according to recognition system of the present invention, comprises the use identifier device,
Fig. 8 a and 8b show modification and the improvement of the embodiment of recognition system shown in Figure 7,
Fig. 9 shows the embodiment according to key generation system of the present invention.
Embodiment
Fig. 1 shows first embodiment according to recognition system of the present invention, comprise identifier main body 10, be used to utilize inquiry 12 to inquire the inquiry unit 13 of identifier main body 10, be used to detect and reply 11 detecting unit 14 and check unit 15, its be used for more detected reply 11 with reply relevant authorization information 16 with expectation, if promptly authorization information 16 is connected in identifier main body 10, expecting so to reply is exactly to reply 11.
Only needn't mean relatively two values by checking the comparison of carrying out unit 15, but can comprise for example reply 11 and authorization information 16 at least one processing, strictly speaking, before relatively taking place.Whether identifier device 10 is identified and depends on whether comparative result mates.
According to the present invention, thereby inquiry 12 is to be applied to first mechanical vibration that identifier main body 10 causes second mechanical vibration, and wherein second mechanical vibration are detected as and reply 11.
First mechanical vibration can put on 1: 17 of identifier main body 10, and it is sent to second difference 18 by identifier main body 10 thus; In the case, second mechanical vibration are represented by the mechanical vibration that are present in 1: 18.Yet second mechanical vibration can also represent by the mechanical vibration at the identical point place of the identifier main body 10 that applies first mechanical vibration,, yet, can only be enough to make first mechanical vibration time of identifier main body 10 internal reflections in the past after.
Identifier main body 10 can be the material of any uneven, any suitable shape, for example parallelepipedon or right cylinder in theory.For example it can comprise the resin that is in solid state with the unevenness that is scattered in wherein.As selection, it can comprise two or more layers different materials, in conjunction with irregular surface of contact.
Compare with the identifier main body with different three-dimensional characters, being present in unevenness in the identifier main body 10 or irregular surface of contact influences the mechanical vibration transmission of portion within it in the mode of the three-dimensional character that reflects identifier main body 10 uniquely.
In order to make identifier main body 10 unique, can produce uneven material by means of non-reproducible processing at random, for example as discrete particles or bubble in being in the resin of fluidised form, solidify this resin and from wherein cutting a part.
Thus obtained identifier main body may be difficult to physically be cloned, especially when having the unevenness of high quantity, variable type and microscopic dimensions.
Fig. 2 a shows the feature with identical size, shape and microcosmic, but three identifier main bodys 10,10 ', 10 with different three-dimensional features "; promptly; unevenness is present in each identifier main body 10,10 ', 10 with varying number and/or position " in, and may have different size and/or shape.Identical challenges 12 is applied to three identifier main bodys 10,10 ', 10 "; representing that the first identical mechanical vibration are applied in three identifier main bodys 10,10 ', 10 " first 17,17 ', 17 "; wherein first is in identical relevant position; and detect in three identifier main bodys 10,10 ', 10 " second 18,18 ', 18 " second mechanical vibration separately as replying 11,11 ', 11 ", wherein second 18,18 ', 18 " be positioned at identical relevant position.Mechanical vibration are associated with the displacement of the particle of all the other positions, and wherein the amplitude contrast time can be illustrated in the chart.The chart 20 of representing first mechanical vibration 12 and three have been shown in Fig. 2 b have replied 11,11 ', 11 " separately chart 21,21 ', 21 ".Because three identifier main bodys 10,10 ', 10 " the three-dimensional character difference, so chart 21,21 ', 21 " difference, thereby can by see separately reply 11,11 ', 11 " be identified or identify.
Therefore notice that the identifier main body that stands mechanical vibration as mentioned above has necessary feature suitably to be used as the identifier in the recognition system:
It has the attribute that is different from any other identifier main body, i.e. its challenge-response behavior,
It is difficult to physically clone,
Its is difficult to imitation, and promptly structure can be predicted for the replying of ad hoc querying, the mathematical relation of the device of the inquiry that causes particular responses of perhaps deducing.
At Qualify Phase, as indicated above, by relatively reply 11 and authorization information 16 come identification marking symbol main body 10.Authorization information 16 is 11 to derive according to previous replying of observing.Specifically, authorization information 16 can be commonly referred to " registration phase " during determine that identifier main body 10 stands to resemble the inquiry 12 that it stands during any Qualify Phase during this period.Detect the thing followed and reply 11 and determine the information relevant with it, promptly authorization information 16.Authorization information 16 can be 11 the record of replying that detects, perhaps 11 measuring assemblies of carrying out of replying to detecting, for example amplitude of the amplitude of first harmonic, some higher hamonic wave and with respect to the phase shift of the phase place of first mechanical vibration.
As selection, authorization information 16 can be the result who is applied to the mathematical function of this record or measuring assembly.Described function can be a kind of secret function and/or one-way function, such as hash function.
Therefore, as expected, check the comparison of carrying out during unit 15 Qualify Phases and needn't mean it only is the comparison of two values.In the most direct application, during registration phase, be applied to reply 11 and determine that the same operation of authorization information 16 also is applied to reply 11 what Qualify Phase detected, thereby before relatively, obtain intermediate result, strictly speaking, take place between result and the authorization information 16 between in these.As selection, also can be essential to the further processing of authorization information 16, if for example authorization information 16 is ciphering types, must before relatively, be decrypted so.
Fig. 3 a shows the attribute of identifier main body 10 as physical function.
Identifier main body 10 is as physical function, receives inquiry 34 as input, and described inquiry 34 expressions can be applied to one group of inquiry 32 of identifier main body 10, and produce belong to one group separately reply 31 separately reply 33 as output.
Exist multiple mode to use different inquiries, for example by applying different mechanical vibration, i.e. the mechanical vibration of available different graphical presentations.For example, if first mechanical vibration are periodic vibration, amplitude, frequency and/or the waveform that can change periodic vibration so obtain difference and reply.Difference is replied also can at least one obtains in first and second by changing.For the purpose of discussing, term inquiry is intended to comprise first mechanical vibration of application, and first and second 's selection, because all these terms influence replying to some extent of detecting.
Can use this attribute so that recognition system is safer,, rather than possible reply 11 according to single because can discern identifier main body 10 according to one or more the replying of replying 31 groups from each.This recognition system is than safer based on single 11 the recognition system of replying because the assailant can by the artificially formerly replying of having seen of Qualify Phase 11 be provided to detecting unit 14 and attempt deception and check unit 15.Yet,, also increased along with the possible increase of replying quantity realizes the difficulty of this attack because the assailant must see all inquiries and reply before he attempts fraud system.Identification can belong to the inquiry subclass that detects 32 groups by utilization and inquire that identifier main body 10 carries out, inquire that wherein 32 groups comprise a large amount of inquiries, for example thousands of, and subclass includes only one or several inquiries, and described subclass is selected from inquiring 32 groups randomly or in any other non-repetitive mode at each Qualify Phase.
Useful in the case is, authorization information 16 can have the form of form 30, shown in Fig. 3 b, and the record 35 that wherein every line display is relevant with the inquiry 34 that belongs to 32 groups of inquiries.Record 35 has the result who is applied to inquire 34 first one-way function in first field 36, and has the result that the correspondence of being applied to is replied 33 second one-way function in second field 37.
This recognition system can be used for the object that is associated with identifier main body 10 is verified that unique condition is that the association between this object and the identifier main body 10 is difficult to interrupt or distort.This object can be an information carrier in exemplary embodiments.The application can be used for the information carrier of any kind; importantly whether appreciation information carrier and/or any information of wherein comprising are not copied to it; the for example smart card or the sign of credit card, bank card, client card, the card that is used to comprise electronic money, any other type or be used for the information carrier of the content of Copy Protection; for example be used to comprise the CD of music, film or software, such as CD or DVD.
Fig. 4 shows the embodiment according to recognition system of the present invention, and wherein the identifier main body is associated with information carrier.Recognition system further comprises the information carrier 40 that is associated with identifier main body 10 in this embodiment, and the device 41 that is used for the visit information carrier.Inquiry unit 13 and detecting unit 14 are combined in and are used for identification marking symbol main body in the device 42.This device 42 that is used for identification marking symbol main body can comprise a plurality of other parts, and in particular for the microprocessor of operating inquiry unit 13 and detecting unit 14 and be used for stored program storer.The device 42 that is used for identification marking symbol main body can be stand-alone configuration or be connected to remote computer and similar device via network.
Checking unit 15 can also be a part that is used for the device 42 of identification marking symbol main body, is stand-alone configuration if particularly be used for the device 42 of identification marking symbol main body; Yet, link to each other with remote computer if be used for the device 42 of identification marking symbol main body, check unit 15 so and can also place remote computer, perhaps even can be distributed in remote computer and be used between the device 42 that identification marking accords with main body.
Exist multiple mode to realize that the association between identifier main body 10 and the information carrier 40 is so that this association is difficult to interruption or forgery.This identifier main body 10 can embed in the information carrier 40, perhaps can be integrated with it, and like this, attempt to delete, substitute or fatal destruction that modified logo symbol main body 10 will cause information carrier 40 and/or identifier main body 10.
Even identifier main body 10 and information carrier 40 are actually separately, when being stored in the information carrier 40, authorization information 16 also obtained similar effects, this is because authorization information 16 can be stored in the mode that is difficult to be modified, and because the authorization information 16 relevant with identifier main body 10 extremely can not equal and other relevant authorization information of one other identification symbol main body.
Therefore, according to this embodiment, recognition system of the present invention can be used for authorization information carrier 40.Information carrier 40 can also be the information carrier of user record; for example as the information carrier that is similar to CD-R or CD-RW; the system of being intended to provides the control to the copy of Copy Protection material, but exchanges the tax in the price of incorporating the blank rocording information carrier into as much as possible for.
Yet recognition system of the present invention can also be used for the purpose except the identifying information carrier, for example is used to generate unique identifier sign indicating number or keys for encryption/decryption.In multiple application, identifier main body 10 can be embedded in the chip and be used to generate chip unique identifier sign indicating number, and perhaps whole recognition system can embed such as in the such terminal of ATM device, and its checking is provided.
As shown in Figure 5, by check the unit 15 that carry out, determine that the assessment whether information carrier 40 is authorized to can be used to the realization condition access scheme.In this embodiment, identifier main body 10 is embedded in the information carrier 40, and wherein information carrier 40 comprises user profile 50 and authorization information 16.The device 41 that is used for the visit information carrier is integrated each other with the device 42 that is used for the identification marking symbol.When information carrier 40 is inserted in the device 41,42, reads authorization information 16 by authorization information-reading unit 51, and send it to and check unit 15.User-information 50 is read by user-information sensing element 52, and be sent to reproduction units 54 via conditional access unit 53, described conditional access unit is just to allow under the condition that is authorized to user-information 50 is transferred to reproduction units 54 checking the definite information carrier 40 in unit 15 only, and promptly one or more the replying for specific one or more inquiries is as expected.
As the replacement of conditional access unit 53, if find that information carrier 40 is not authorized to, perhaps the information of the mandate of carrier 40 is merely able to store in order to using afterwards for information about, can generate warning message so.
Also only some user-information 50 must be through conditional access, and unconditional visit is freely offered remaining user-information.If information carrier 40 is intended to be used for allowing the holder to carry out some operation, for example withdraw deposit from bank account, conditional access unit 53 allows this operation so.
User-information 50 that information carrier 40 is wanted to carry can be for example record, the situation of film, computer program or particularly smart card, be detailed description to card holder or card identification number, carry out some operation to allow the card holder.
Show that in the accompanying drawings user-information 50 and authorization information 16 are to be read by two different unit, yet authorization information-fetch unit 51 and user-information reading unit 52 also may be integrated each other.
The authorization information 16 that is present in the information carrier 40 can write down after having determined during registration phase at first in advance thereon.Authorization information 16 can occupy the predetermined segment of the storage space that also is designed to comprise user-information 50, be preferably the section that disturbs without any user-visit, and more preferably, be treated to complete sightless section to the user, under the situation of CD, this section can be represented by the section in importing or the export area.As selection, in the second-level storage space that authorization information 16 can be stored in secondary channel in the information carrier 40 is associated, under the situation of CD, information carrier 40 can be represented by wobble channel, promptly embeds the information channel of the radial modulation of helical orbit.
Embodiment shown in Fig. 5 provides a kind of conditional access scheme, and it determines to have only when finding that information carrier 40 is these information carriers 40 of device access that just allow adaptation of authorizing.
Further, useful embodiment has been shown among Fig. 6, has encrypted according to the user-information 50 that provides on this embodiment information carrier 40.Decruption key 61 can be by reply 11 extraction of decruption key extraction unit 60 from being detected by detecting unit 14.The decruption key 61 of Ti Quing is used for the user profile 50 of decrypt encrypted by decryption unit 62 then.In the simplest embodiment, can use the cryptographic algorithm of symmetry, and during registration phase, determine keys for encryption/decryption 61, user-information 50 encrypted being stored in then in the information carrier 40 afterwards.Have only when the decruption key that extracts and use 61 is correct, promptly when reply 11 be expectation can extract out when replying decruption key the time, just can retrieve effective user profile 50.In this embodiment, decruption key extraction unit 60 and decryption unit 62 are carried out and are checked the function of unit 15 and conditional access unit 53, just can obtain effective information because have only when using correct decruption key 61.The fact that effective user-information 50 is being exported by decryption unit 62 can be self-evident or evaluate when the form of seeing user-information 50 or content: these operations can be carried out by the extra cell that is called user-effectiveness of information verifier 63.In the case, whole user-information 50 can be counted as authorization information 16.As selection, customizing messages can embed in user-information 50, can promptly discern this customizing messages when user-information 50 is correctly decrypted.Customizing messages is represented authorization information 16 in the case.
This embodiment has very strong advantage and is: copy the user-information 50 of encrypting in second information carrier that does not have the identifier main body or be not forged bit by bit, therefore different identifier main bodys can not visited by the device of non-compatibility.
So just can realize powerful copy protection schemes.The known technology of technical field is strengthened this system under can further utilizing, for example as under the situation of audio frequency or video content, outside security context, only reproduce content, the chip that the user-information of for example wherein encrypting 50 is decrypted or the copy control information of embed watermark-carrying in the user-information 50 that provides with analog form.Must say that, also can realize other embodiment of copy protection schemes based on recognition system of the present invention.For example, the decruption key that the user profile 50 of the encryption that provides on the decryption information carrier 40 is provided can be transmitted by remote computer when good authentication information carrier 40.
As mentioned above, identifier main body 10 can obtain owing to uncontrolled processing, hinting that two identifier main bodys must be different, therefore cause different replying and different authorization informations, make each information carrier 40 have the different and unique authorization information 16 of possibility and/or utilize may be different the key 61 user-information 50 of encrypting.The smart card that this result can wherein have been stored about user's details is accepted, because also be unique on the stored information theory, so authorization information 16 is that unique fact does not have obviously to increase for the storage full detail, about the complicacy of the processing of user's details and authorization information 16.
Yet identical conclusion is not compressed CD and accepts, wherein for example the content of music, film or software and so on must be duplicated on a large amount of CDs: in the case, have the information section in fact, the different authorization informations of coiling dish can make stores processor very complicated and expensive.
What is interesting is, the pre-european patent application of announcing 03103800.3 (PHNL031268) discloses a kind of by means of a plurality of methods with information carrier of identical identifier main body of marking generation that obtained by uncontrolled processing, wherein uses the marking to impress printable material so that the optical identifier that obtains to be equal to control mode.Also can be used to obtain the identifier main body of utilizing mechanical vibration to inquire in conjunction with this technology, the present invention can be conveniently used in wherein that information carrier is the system of compact disk.
The experiment confirm that the inventor carries out:, stand identical challenges by described two different identifier main bodys so and two of producing reply and will small difference be shown if two different identifier main bodys are very similar.Two difference between replying can mean two distances between the association diagram, if instead for example quantity, position, the size and shape of unevenness is much at one in two main bodys, two different identifier main bodys can be described as very similar so.This point is expressed recognition system according to the present invention and is with the further by comparison advantage of the known recognition system of prior art: the minute differences in the three-dimensional feature can cause different to a great extent speckle pattarns.Even under the situation of some less difference, in fact this feature can be advantageously used in effectively being used to detect from the identical of a plurality of identifier main bodys replying in the three-dimensional feature that produces owing to the tolerance deviation in the production technology.Because same reason is strengthened the change that prevention may occur simultaneously more according to recognition system of the present invention in the identifier main body, for example because the fingerprint that occurs on environmental change or the identifier main body.
Fig. 7 shows another embodiment according to recognition system of the present invention, comprises according to this embodiment inquiry unit 13:
-the first transducer 70 is used to send first mechanical vibration; And
-the first transducer control module 71 is used to control first transducer 70; And
Detecting unit 14 comprises:
-the second transducer 72 is used to detect second mechanical vibration; And
-the second transducer control module 73 is used to control second transducer 72.
The first transducer control module 71 and the second transducer control module 73 are included in the device 42 that is used for identification marking symbol main body, and first transducer 70 and second transducer 72 for good and all are fixed to identifier main body 10 and constitute identifier device 74 together with identifier main body 10.
This embodiment provides significant mechanical simplicity, because 1: 17 and 1: 18 fixes, therefore given repeatability of replying needn't rely on inquiry with correspondence accurately be applied to identifier main body 10 1: 17 and reply just in time detecting on 1: 18.Two transducers by means of being electrically connected 75,76 controls, are electrically connected the 75, the 76th by each control module, and the device 42 that is used for identification marking symbol main body sets up by identifier device 74 is inserted into.
This recognition system inside is firm more and can utilize few parts to realize with very low cost.
The hint of duplicating two transducers for each identifier main body 10 is counted as problem of smaller, because two transducers can be cheap and small-sized especially, if especially use acoustic transducer.
In this embodiment, fully depend on the mechanical vibration of using available different graphical presentation, wherein 1: 17 and 1: 18 fix thereby use different inquiries and generate the different possibilities of replying.
This limitation is that the improvement by the recognition system shown in Fig. 8 a overcomes, wherein a spot of first transducer 70,70 ' and second transducer 72,72 ', 72 in identifier device 74 " be present in a plurality of positions of identifier main body 10.
The first transducer control module 71 is suitable for activating selectively first transducer 70, one of them of 70 ', and the same second transducer control module 73 is suitable for activating second transducer 72,72 ', 72 selectively " one of them.By utilizing all possible combination of paired first transducer-second transducer, can expand the quantity of inquiring and replying separately like this.
Can further expand the quantity of inquiring and replying according to another improvement shown in Fig. 8 b.Transducer is a double- purpose transducer 80,80 ', 80 in the case ", 80 ' ", promptly can be used to send first mechanical vibration and can also be used to detect second mechanical vibration.
Each double- purpose transducer 80,80 ', 80 ", 80 ' " respectively by the first transducer control module 71 and the control of the second transducer control module 73, to use as first transducer 70 and second transducer 72 respectively.
Fig. 9 shows the embodiment according to key generation system of the present invention.In fact, introduced in as mentioned, the present invention can also be used to generate key or unique identifier sign indicating number.Key generation system according to the present invention is different from the recognition system part shown in Fig. 1 and is, cipher key extraction unit 60 uses are replied 11 and extracted key 61, check unit 15 and authorization information 16 thereby save.This key 61 can be used for carrying out the encipherment scheme of Secure Transaction, can also be as identification code.The key 61 that generates can also be counted as random number, and therefore key generation system according to the present invention can also be used to generate random number.
Cipher key extraction unit 60 can comprise mathematical function, particularly hash function, is applied to write down or collect the measurement to replying 11.Mandatory declaration be that cipher key extraction unit 60 and detecting unit 14 can be integrated each other.In one embodiment, specifically, can directly use replying 11 measurement as key.
Be similar to according to recognition system of the present invention, this key generation system can be used for two different stages: registration and key generate, and for example session key generates.Key generation system according to the present invention can be used for the single stage, promptly is used to generate the stage of key or identification code yet in some applications.
In one embodiment, cipher key extraction unit 60 can comprise mathematical algorithm, and it comprises feature extraction part, help data division, error correcting code and also has hash function sometimes.Helping data is in the data that obtain during the registration phase and use during the key generation phase.Their main target is to allow to extract reliable feature so that some error correction information to be provided, so that realize the repeatability of key-extraction from measure.Therefore help data to be counted as and be used for from measuring the means of removal noise.
Although the present invention has illustrated about being applied to the recognition system of authorization information carrier, yet it is evident that other application also is fine.Therefore scope of the present invention is not limited to aforesaid embodiment.
It must be noted that, when using term " to comprise " in this instructions that is comprising claims, be the existence that will specify described feature, integer, step or parts, but do not get rid of the existence or the interpolation of one or more further features, integer, step, parts or its combination.Also must be noted that " one " in the element front.Do not get rid of the existence of a plurality of this elements in the claims.And any reference marker does not limit the scope of claim; The present invention can realize by means of hardware and software, and a plurality of " devices " can be represented by identical item of hardware.In addition, the present invention is present in each novel features or the assemblage characteristic.
The present invention can be summarized as follows.The present invention relates to a kind of recognition system, wherein identifier is the main body that comprises heterogeneous material, wherein discern main body by making main body stand mechanical vibration (particularly acoustic vibration), how the transmission of observing mechanical vibration is subjected to the influence of the unevenness that exists in the main body, and based on previous observation identification main body.This identifier main body can be associated with information carrier verifying this information carrier, and is used to rely on its conditional access or copy protection schemes.Acoustics identification according to the present invention can be counted as the alternative of main body well known in the prior art being carried out optical identification, and described alternative is compared with optical identification and comprised: various simplification in higher steadiness, the recognition system and realization cheaply.
Claims (20)
1, a kind of recognition system comprises:
Identifier main body (10) is used for replying (11) utilizing inquiry (12) to produce when inquiring;
Inquiry unit (13) is used for utilizing and inquires the identifier main body, and wherein inquiry unit can apply first mechanical vibration as inquiry, and it transmits to produce second mechanical vibration;
Detecting unit (14) is used for detecting and replys, and is wherein represented to reply by second mechanical vibration; And
Check unit (15), be used for relatively replying and authorization information (16), this authorization information is replied relevant with expectation, it is characterized in that, described identifier main body (10) comprises unevenness or the layer that is combined by irregular surface of contact by different materials, so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
2, recognition system as claimed in claim 1, wherein
Inquiry unit (13) can be applied to first mechanical vibration on first point (17) of identifier main body (10), is sent to second point (18) of identifier main body from here, and
Detecting unit (14) can detect second mechanical vibration on second of identifier main body.
3, recognition system as claimed in claim 1, wherein:
Inquiry unit (13) can also provide one group of inquiry (32), and the inquiry of inquiry group causes reply (31) separately;
Authorization information (16) also with expected each reply relevant; And
Checking unit (15) can also compare each and reply and authorization information.
4, recognition system as claimed in claim 3, wherein inquiry unit (13) can also generate the periodic mechanical vibration with frequency, amplitude and waveform, and in this frequency, amplitude and the waveform at least one is variable parameter.
5, as claim 2 and 3 described recognition systems, wherein at least one in first point (17) and second point (18) is variable.
6, recognition system as claimed in claim 1 further comprises information carrier (40) that is coupled to identifier main body (10) and the device (41) that is used for the visit information carrier.
7, as claim 1 or 6 described recognition systems, wherein inquiry unit (13) and detecting unit (14) are included in the device (42) that is used for identification marking symbol main body.
8, as claim 1 or 6 described recognition systems, wherein inquiry unit (13) comprising:
First transducer (70) is used to send first mechanical vibration; And
The first transducer control module (71) is used to control first transducer; And
Detecting unit (14) comprising:
Second transducer (72) is used to detect second mechanical vibration; And
The second transducer control module (73) is used to control second transducer; And
The first transducer control module and the second transducer control module are included in the device (42) that is used for identification marking symbol main body, and first transducer, second transducer and identifier main body constitute identifier device (74).
9, recognition system as claimed in claim 8, wherein at least one in inquiry unit (13) and the detecting unit (14) comprises additional transducers (70 ', 72 ', 72 ").
10, recognition system as claimed in claim 8, wherein second transducer (72) also is suitable for sending first mechanical vibration, and first transducer (70) also is suitable for detecting second mechanical vibration.
11, a kind of device (42) that is used for identification marking symbol main body, wherein utilize inquiry (12) when inquiring identifier main body (10) produce and reply (11), described device comprises:
The first transducer control module (71) is used to control first transducer (70) inquiry is applied to the identifier main body, and wherein first transducer is applicable to and sends first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
The second transducer control module (73) is used to control second transducer (72) and detects and reply, and wherein replys by second mechanical vibration and represents; And
Check unit (15), be used for relatively replying and authorization information (16), it is relevant that this authorization information and expectation are replied,
It is characterized in that, described identifier main body (10) comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
12, the device (42) that is used for identification marking symbol main body as claimed in claim 11, further comprise first transducer (70) and second transducer (72), first transducer and the first transducer control module (71) integrate and are included in the inquiry unit (13), and second transducer and the second transducer control module (73) integrate and are included in the detecting unit (14).
13, a kind of identifier device (74) that comprises identifier main body (10), this identifier main body are used for replying (11) utilizing inquiry (12) to produce when inquiring, this identifier device also comprises:
First transducer (70) is used to send first mechanical vibration, and its transmission is so that produce second mechanical vibration; And
Second transducer (72) is used to detect second mechanical vibration,
It is characterized in that, described identifier main body (10) comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
14, identifier device as claimed in claim 13 (74) further comprises at least one additional transducers (70 ', 72 ', 72 ").
15, identifier device as claimed in claim 13 (74), wherein second transducer (72) also is suitable for sending first mechanical vibration, and first transducer (70) also is suitable for detecting second mechanical vibration.
16, a kind of information carrier (40) that comprises as each described identifier device (74) of claim 13 to 15.
17, a kind of method that is used for identification marking symbol main body (10), this identifier main body are used for replying (11) utilizing inquiry (12) to produce when inquiring, this method comprises:
The inquiry step utilizes inquiry the identifier main body to be inquired described inquiry is first mechanical vibration of sending during inquiring, its transmission is so that produce second mechanical vibration;
Detect step, detect between detection period and reply, described replying by second mechanical vibration represented; And
Checking step will be replied during checking with authorization information (16) and be compared, and it is relevant that this authorization information and expectation are replied,
It is characterized in that, described identifier main body (10) comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
18, a kind of key generation system comprises:
Identifier main body (10) is used for replying (11) utilizing inquiry (12) to produce when inquiring;
Inquiry unit (13) is used for utilizing inquiry the identifier main body to be inquired wherein inquiry unit can apply first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
Detecting unit (14) is used for detecting and replys, and wherein said replying by second mechanical vibration represented; And
Cipher key extraction unit (60) is used for extracting key (61) from replying,
It is characterized in that, described identifier main body (10) comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
19, a kind of device that is used for generating key from the identifier main body, wherein utilize inquiry (12) when inquiring identifier main body (10) produce and reply (11), described device comprises:
The first transducer control module (71) is used to control first transducer (70) inquiry is applied to the identifier main body, and wherein first transducer is applicable to and sends first mechanical vibration as inquiry, and its transmission is so that produce second mechanical vibration;
The second transducer control module (73) is used to control second transducer (72) and replys with detection, and wherein this is replied by second mechanical vibration and represents; And
Cipher key extraction unit (60) is used for extracting key (61) from replying,
It is characterized in that, described identifier main body (10) comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
20, a kind of method that is used for generating key (61) from identifier main body (10), utilize inquiry (12) when inquiring this identifier main body produce and reply (11), described method comprises:
The inquiry step utilizes inquiry the identifier main body to be inquired described inquiry is first mechanical vibration of sending during inquiring, its transmission is so that produce second mechanical vibration;
Detect step, detect between detection period and reply, described replying by second mechanical vibration represented; And
Cipher key extraction step, during milking key extracts from reply,
It is characterized in that, described identifier main body (10) comprise unevenness or by different materials by irregular surface of contact combine the layer so that influence the transmission of described first mechanical vibration, thereby reflect the three-dimensional character of identifier main body (10) uniquely.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04101921.7 | 2004-05-05 | ||
| EP04101921 | 2004-05-05 | ||
| EP04103381.2 | 2004-07-15 |
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| Publication Number | Publication Date |
|---|---|
| CN1961327A CN1961327A (en) | 2007-05-09 |
| CN100592330C true CN100592330C (en) | 2010-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580014190A Expired - Fee Related CN100592330C (en) | 2004-05-05 | 2005-05-03 | Identification system using mechanical vibrations on identifier |
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| Country | Link |
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| CN (1) | CN100592330C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012091164A1 (en) * | 2010-12-28 | 2012-07-05 | 日本電気株式会社 | Method of generating key |
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2005
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| CN1961327A (en) | 2007-05-09 |
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