摘要:
Biometric data relating to a biological part are processed by obtaining, on the one hand, a first set of transformed biometric data (f(B1)) by applying at least one irreversible transformation to a first set of biometric data (B1), and, on the other hand, a second set of transformed biometric data (f(B2)) by applying said transformation to a second set of biometric data (B2). Thereafter, a decision is made as to whether the second biometric data set corresponds to the first biometric data set on the basis of a comparison between the first transformed biometric data set and the second transformed biometric data set, said comparison being performed at the bit level of a digital representation of said first and second transformed biometric data sets as a function of an error corrector code word.
摘要:
A database comprising biometric data stored in encrypted form is managed by a management unit. It comprises a set of filters respectively associated with filter identifiers. A biometric data item is received at a management unit; next, said biometric data item is stored in an encrypted form at a given address in the database. Then keywords are obtained on the basis of a first set of hash functions and of the biometric data item. A subset of indexing filters is associated with each keyword by selecting, for each keyword, filters as a function of the respectively associated filter identifiers, of said keywords, and of a second set of hash functions; and the given address is associated with each of the filters of the subset of filters.
摘要:
A cryptographic calculation is carried out in an electronic component according to a specific cryptographic algorithm including at least one specified non-linear operation on blocks of data of k bits, k being a whole number of more than 2. Several blocks of masked intermediate data of j bits are generated from an initial block of data of k bits, j being a whole number that is smaller than k. Then a non-linear operation S is applied to at least one of the masked intermediate data blocks of j bits with the aid of a substitution table with 2 inputs producing a modified data block of j bits. The modified data block of j bits and at least some of the masked intermediate data blocks of j bits are combined to form a result block of k bits corresponding to the initial data block of k bits by means of a transformation including the specified non linear operation.
摘要:
A method includes transmitting a first digital channel (X0) from a reader to a marker, receiving a second digital channel (Y0) corresponding to the first digital channel and to errors introduced by a noisy channel, introducing artificial errors into at least one of the first or second digital channels, carrying out an advantage distillation phase in such a way that a new first digital channel (X1) is determined for the reader. A new second digital channel (Y1) is determined for the marker such that the advantage is taken with respect to a possible passive attacker. In an information reconciliation phase, an error-correcting protocol is applied to the new first (X2) and new second (Y2) digital channel, and in carrying out a secrecy amplification phase, a hash function (G) is applied to the new first (X2*) and the new second (Y2*) digital channel.
摘要:
A database comprising biometric data stored in encrypted form is managed by a management unit. It comprises a set of filters respectively associated with filter identifiers. A biometric data item is received at a management unit; next, said biometric data item is stored in an encrypted form at a given address in the database. Then keywords are obtained on the basis of a first set of hash functions and of the biometric data item. A subset of indexing filters is associated with each keyword by selecting, for each keyword, filters as a function of the respectively associated filter identifiers, of said keywords, and of a second set of hash functions; and the given address is associated with each of the filters of the subset of filters.
摘要:
In a control system comprising control device adapted for, on the one hand, receiving signal indicating a first biometric datum (W), and, on the other hand, obtaining a second biometric datum captured (w′), at the level of the control device, the first and second biometric date are compared. Next, it is decided whether the first and second biometric data correspond on the basis of the comparison. Thereafter, at least a secret cryptographic key part (H(w)) is generated by applying cryptographic function to the first biometric datum.
摘要:
The invention relates to a method for enabling the authentication or identification of a person (1) using a first electronic device (2) comprising an image-capturing unit and a data-transmission unit, the method including a step of registering said person in a verification system (3). The registration step includes the steps of: capturing, using the image-capturing unit of said electronic device, a first image (h) of at least one object (O) of any kind that is secretly selected by the person; and transmitting said first image to the verification system by means of said data transmission device of said first electronic device.
摘要:
Additional information regarding a fingerprint is estimated, with a given level of confidence, on the basis of characteristics of a set of minutiae corresponding to this print. Local descriptors are determined around some at least of the minutiae, so that they comprise, in relation to zones comprising additional information estimated with the given confidence level, values calculated on the basis of said information and, in relation to zones not comprising such information, erasures. The local descriptors determined are quantized according to a given number of integer values, a value being reserved for erasures. The quantized local descriptors are coded with the aid of an error-tolerant coding algorithm associated with a decoding algorithm devised to take account of errors and erasures. And a pseudo-identity is determined on the basis of some at least of the coded quantized local descriptors.
摘要:
The invention relates to a coding method consisting of the following steps: biometric data associated with an individual is obtained; a word, relating to an error correction code, selected in order to correct a quantity of errors in a relation to a statistical quantity of errors between two biometric measurements relating to the same individual, is generated, said word dissimulating information relating to said individual with the aid of a private function; and a combination is created between the biometric data thus obtained and the word thus generated.
摘要:
The invention relates to equipment for the identification of an individual by capture of body imprint images and of the underlying venous network, comprising: a prismatic optical element having: a large side for apposition of a body zone; a first inclined lateral side receiving a first radiation having a first wave length emitted by a first lighting means to light the large side with total reflection; a second inclined lateral side facing a first sensor receiving the first reflected radiation carrying an image of the body imprint; and a small side receiving a second radiation having a second wave length emitted by second lighting means, perpendicularly reaching the apposition zone and penetrating the body zone, and which faces a second sensor receiving the second reflected radiation carrying an image of the underlying venous network.