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1. 发明授权

US10348483B2 Method for executing a cryptographic calculation and application to the classification by support vector machines 有权
公开(公告)号：US10348483B2
公开(公告)日：2019-07-09
申请号：US15418314
申请日：2017-01-27
申请人： SAFRAN IDENTITY & SECURITY
发明人： Constance Morel , Julien Bringer , Herve Chabanne
IPC分类号： G06F11/30 , G06F12/14 , H04L9/06 , G06F21/72 , H04L9/00
摘要： A method for calculating a function as a sub-function fX of a datum of a client, a sub-function fY of a datum, and a product of n indexed sub-functions fi of both data by randomly generating, n indexed invertible data ri from the set with m being a prime number, generating, for each i from 1 to n, a set for which each element is formed by a product of a datum ri with a possible result of the sub-function of two variables fi evaluated in both data, applying an oblivious transfer protocol between the client and a server so that the client recovers, for each i an intermediate datum ti equal to: ti=ri×fi(xi,Y), obtaining, by the client a result T from intermediate data such that: T=fX(X′)×Πi=1nti, obtaining, by the server a result R from inverted data such that: R=fY(Y)×Πi=1nri−1 using the results in a cryptographic application.

2. 发明授权

US10461935B2 Verification process of authentication or biometric identification 有权
公开(公告)号：US10461935B2
公开(公告)日：2019-10-29
申请号：US15582358
申请日：2017-04-28
申请人： Safran Identity & Security
发明人： Julien Paul Keuffer , Herve Chabanne , Roch Lescuyer
IPC分类号： G06F7/02 , G06F19/00 , G06F21/32 , G06F21/34 , G06F21/83 , G06K9/00 , H04L9/32 , H04L29/06 , G06Q20/40
摘要： The invention proposes a method for processing biometric data, comprising verification of the result of a calculation of distance between a biometric candidate datum and at least one biometric reference datum, each comprising a number n of indexed components (ai, bi), said calculation of distance comprising that of a polynomial of the components of the biometric data,the method being executed by a proving entity and a verification entity, the method comprising steps during which: the proving entity communicates to the verification entity the result of calculation of the distance between the candidate and reference biometric data, and said data, the proving entity generates from each datum a function of a number d of variables fa(i1, . . . , id), fb(i1, . . . , id) where d=log2 n, defined for each variable on the set {0,1}, by reformulation of the index i of each component (ai, bi) in binary format, the proving entity generates from each function a polynomial of d variables ã(x1, . . . xd), {circumflex over (b)} (x1, . . . xd) defined on d where is a finite field, such that each polynomial ã, {circumflex over (b)} coincides with the corresponding function fa,fb on the set {0,1}d, and generates from the polynomials ã, {circumflex over (b)} a polynomial p(x1, . . . , xd) of d variables of the same expression as that of the distance between the data, and the proving entity and the verification entity engage in a Sumcheck protocol applied to the polynomial p to verify the result of calculation of the distance between the data.

3. 发明授权

US10375066B2 Authentication method and system by garbled circuit 有权
公开(公告)号：US10375066B2
公开(公告)日：2019-08-06
申请号：US15648300
申请日：2017-07-12
申请人： Safran Identity & Security
发明人： Herve Chabanne , Constance Morel
IPC分类号： H04L29/06 , H04L9/32
摘要： the invention proposes a method and an associated system for authenticating a user, by means of the redundancy present between several images of a video, the method using garbled circuits, named variant garbled circuits, associated with the alternative bits between the images of the video and a garbled circuit named invariant garbled circuit, associated with the invariant bits between the images of the video, so that the invariant garbled circuit only needs to be evaluated a single time.

4. 发明授权

US10230724B2 Identification method of an entity 有权
公开(公告)号：US10230724B2
公开(公告)日：2019-03-12
申请号：US15353633
申请日：2016-11-16
申请人： Safran Identity & Security
发明人： Julien Bringer , Roch Olivier Lescuyer De Chaptal-Lamure , Herve Chabanne , Eduardo Soria-Vazquez
IPC分类号： H04L29/06 , G06F17/10 , G06F21/32 , H04L9/32 , H04L9/08
摘要： A biometric identification method of an entity including computation of a matching value between biometric data of an entity u and reference biometric data u′, by application of a function F to the biometric data. A non-interactive, publicly verifiable computation method is performed wherein representation of the function is obtained by converting an arithmetic circuit into a polynomial representation. A matching value is obtained by evaluating the arithmetic circuit and the reference biometric data as inputs. Proof of correction of the computation execution of the matching values is obtained. Verification of said received proof. The function is encoded with an integer k>1 of a vector of a biometric datum on at least one input wire of the circuit. The function includes at least m scalar products. Evaluation of the circuit is iteratively computed depending on the value of m.

5. 发明授权

US10403076B2 Method for securing and verifying a document 有权
公开(公告)号：US10403076B2
公开(公告)日：2019-09-03
申请号：US15429093
申请日：2017-02-09
申请人： Safran Identity & Security
发明人： Herve Chabanne , Jean-Christophe Fondeur , Stephane Gentric , Erik Van Dijk
IPC分类号： G07D7/00 , G07D7/20 , G07D7/004 , G07D7/0047 , G07D7/01 , G01N21/00 , G07D7/005 , G07D7/202
摘要： The invention relates to a method for securing a document including a visual element, carried out by a processing unit comprising processing means, the method comprising generation, from the visual element, of a reference security datum, and storage of the reference security datum,wherein the reference security datum is generated by means of an algorithm configured so as to generate: for any image acquired from the visual element, a security datum whereof the differences relative to the reference security datum are less than a determined threshold, and for any image acquired on a different visual element, a security datum whereof the differences relative to the reference security datum are greater than said threshold.

6. 发明授权

US10411882B2 Multiparty secure calculation method protected against a malevolent party 有权
公开(公告)号：US10411882B2
公开(公告)日：2019-09-10
申请号：US15418352
申请日：2017-01-27
申请人： SAFRAN IDENTITY & SECURITY
发明人： Constance Morel , Julien Bringer , Herve Chabanne
IPC分类号： H04L9/06 , G06F21/72 , H04L9/14 , H04L9/32 , H04L9/30
摘要： The invention proposes a method comprising the evaluation of a function F obtained by applying to n sub-functions fi a first operation, the evaluation comprising: the application of a series of calculation steps in which a first unit assumes a role of a client and a second unit assumes a role of a server, and the repetition of the series of calculation steps in which the roles of client and of server are exchanged between the units, each series of steps comprising: a) randomly generating, by the server, first data, and a second datum, b) for each sub-function fi, generating by the server a set of elements formed by: a result of fi evaluated in the data of the client and of the server, masked by a first datum, by applying the first operation between the result and the first datum, and masked by the second datum, by applying between the masked result and the second datum of a second operation different from the first and distributed relatively to the latter, c) recovering by oblivious transfer, by the client, an intermediate datum corresponding to one of the elements generated by the server, d) generating, by the server, a first result portion, by: masking each first datum with the second datum, applying to all the first masked data of the first operation, and e) generating by the client, a second result portion, by applying all the intermediate data of the first operation.

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