Identification System Using Mechanical Vibrations on Identifier
First Claim
1. An identification system comprising:
- an identifier body (10) for producing a response (11) upon being challenged with a challenge (12);
a challenging unit (13) for challenging the identifier body with the challenge, which challenging unit is capable of applying, as the challenge, a first mechanical vibration, so as to cause a second mechanical vibration;
a detection unit (14) for detecting the response, which response is represented by the second mechanical vibration; and
a verification unit (15) for comparing the response with authentication information (16), the authentication information being related to an expected response.
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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 can be 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 to the 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.
36 Citations
20 Claims
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1. An identification system comprising:
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an identifier body (10) for producing a response (11) upon being challenged with a challenge (12); a challenging unit (13) for challenging the identifier body with the challenge, which challenging unit is capable of applying, as the challenge, a first mechanical vibration, so as to cause a second mechanical vibration; a detection unit (14) for detecting the response, which response is represented by the second mechanical vibration; and a verification unit (15) for comparing the response with authentication information (16), the authentication information being related to an expected response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for identifying an identifier body (41), which identifier body (10) is producing a response (11) upon being challenged with a challenge (12), comprising:
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a first transducer control unit (71), for controlling a first transducer (70) for applying the challenge to the identifier body, which first transducer is suitable for emitting a first mechanical vibration as the challenge, so as to cause a second mechanical vibration; a second transducer control unit (73), for controlling a second transducer (72) for detecting the response, which response is represented by the second mechanical vibration; and a verification unit (15) for comparing the response with authentication information (16), the authentication information being related to an expected response. - View Dependent Claims (12)
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13. An identifier device (74) comprising an identifier body (10), for producing a response (11) upon being challenged with a challenge (12), further comprising:
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a first transducer (70), for emitting a first mechanical vibration, so as to cause a second mechanical vibration; and a second transducer (72), for detecting the second mechanical vibration. - View Dependent Claims (14, 15, 16)
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17. A method for identifying an identifier body (10) for producing a response (11) upon being challenged with a challenge (12), comprising:
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a challenging step, during which the identifier body is challenged with the challenge, the challenge being a first mechanical vibration which is emitted, so as to cause a second mechanical vibration; a detection step, during which the response is detected, which response is represented by the second mechanical vibration; and a verification step, during which the response is compared with authentication information (16), the authentication information being related to an expected response.
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18. A key generation system comprising:
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an identifier body (10) for producing a response (11) upon being challenged with a challenge (12); a challenging unit (13) for challenging the identifier body with the challenge, which challenging unit is capable of applying, as the challenge, a first mechanical vibration, so as to cause a second mechanical vibration; a detection unit (14) for detecting the response, which response is represented by the second mechanical vibration; and a key extraction unit (60) for extracting a key (61) from the response.
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19. An apparatus for generating a key from an identifier body, which identifier body (10) is producing a response (11) upon being challenged with a challenge (12), comprising:
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a first transducer control unit (71), for controlling a first transducer (70) for applying the challenge to the identifier body, which first transducer is suitable for emitting a first mechanical vibration as the challenge, so as to cause a second mechanical vibration; a second transducer control unit (73), for controlling a second transducer (72) for detecting the response, which response is represented by the second mechanical vibration; and a key extraction unit (60) for extracting a key (61) from the response.
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20. A method for generating a key (61) from an identifier body (10) for producing a response (11) upon being challenged with a challenge (12), comprising:
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a challenging step, during which the identifier body is challenged with the challenge, the challenge being a first mechanical vibration which is emitted, so as to cause a second mechanical vibration; a detection step, during which the response is detected, which response is represented by the second mechanical vibration; and a key extraction step, during which the key is extracted from the response.
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Specification