专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP4387157A1 BLINDED SEMI-STATIC ELLIPTIC CURVE DIFFIE-HELLMAN AUTHENTICATION PROTOCOL 审中-公开
公开(公告)号：EP4387157A1
公开(公告)日：2024-06-19
申请号：EP23215227.2
申请日：2023-12-08
申请人： NXP B.V.
发明人： Murray, Bruce , Lamberger, Mario
IPC分类号： H04L9/00 , G06F7/72 , H04L9/30 , H04L9/32 , H04L9/08
CPC分类号： H04L2209/80520130101 , H04L2209/04620130101 , H04L2209/0820130101 , H04L9/3218 , H04L9/3013 , H04L9/003 , H04L9/3066 , H04L9/085
摘要： Various embodiments relate to a data processing system comprising instructions embodied in a non-transitory computer readable medium, the instructions for an elliptic curve cryptography authentication method based on an elliptic curve in a processor, the instructions, comprising: generating, by a verifier, a random challenge r; multiplying, by the verifier, the random challenge r by a basepoint G to produce R; sending an x coordinate of R to a prover; receiving an x-coordinate of a first point P1 and a second point P2 from the prover, wherein P1 is based on a random share q1 of the private key q of the prover and R, and wherein P2 is based on a random share q2 of the private key q and R; where q = q1 - q2, finding a point P1' on the elliptic curve having an x-coordinate of the first point P1; finding a point P2' on the elliptic curve having an x-coordinate of the second point P2; and authenticating the prover when an x-coordinate of one of P1'+P2' and P1'−P2' matches an x-coordinate of r · Q, wherein Q is a public key of the prover.

2. 发明公开

EP4395227A1 ADAPTIVE COUNTERMEASURE FOR BIT LEAKAGE IN LATTICE-BASED CRYPTOGRAPHY 审中-公开
公开(公告)号：EP4395227A1
公开(公告)日：2024-07-03
申请号：EP23218505.8
申请日：2023-12-20
申请人： NXP B.V.
发明人： Azouaoui, Melissa , Schneider, Tobias , Schoenauer, Markus
IPC分类号： H04L9/00 , H04L9/30 , H04L9/08
CPC分类号： H04L9/003 , H04L9/3093 , H04L2209/0820130101 , H04L2209/04620130101 , H04L9/085
摘要： A device may include a computer-readable memory and an integrated circuit including a processor configured to implement a cryptographic operation, wherein the cryptographic operation enables computation of a cryptographic result using a bit masking value y. The processor may be configured to access the computer-readable memory to determine a set of bit indexes, wherein each bit index in the set of bit indexes is associated with a bit value in the bit masking value y, for each bit index in the set of bit indexes, calculate an adaptive share value in which the bit value associated with the bit index is masked, and execute a cryptographic operation using the adaptive share value.

3. 发明授权

EP3552339B1 PROGRAMMABLE BLOCK CIPHER WITH MASKED INPUTS 有权
公开(公告)号：EP3552339B1
公开(公告)日：2024-07-03
申请号：EP17877778.5
申请日：2017-12-04
IPC分类号： H04L9/06 , H04L9/00
CPC分类号： H04L9/0637 , H04L2209/04620130101 , H04L9/003

4. 发明授权

EP3857810B1 PROCÉDÉ CRYPTOGRAPHIQUE DE COMPARAISON SÉCURISÉE DE DEUX DONNÉES SECRÈTES X ET Y 有权
公开(公告)号：EP3857810B1
公开(公告)日：2024-06-12
申请号：EP19790682.9
申请日：2019-09-20
IPC分类号： H04L9/00
CPC分类号： H04L9/00 , H04L9/302 , H04L2209/04620130101 , H04L2209/4620130101

5. 发明公开

EP4422126A1 METHOD FOR OPTIMIZING AN EXECUTION OF A GENERATION OF A CRYSTALS-DILITHIUM POST-QUANTUM SIGNATURE 审中-公开
公开(公告)号：EP4422126A1
公开(公告)日：2024-08-28
申请号：EP23305221.6
申请日：2023-02-21
申请人： THALES DIS FRANCE SAS
发明人： BERZATI, Alexandre , CALLE VIERA, Andersson
IPC分类号： H04L9/32 , H04L9/30
CPC分类号： H04L9/3247 , H04L9/3093 , H04L2209/04620130101
摘要： The present invention relates to a method method for optimizing the execution of the generation of a Crystals-Dilithium post-quantum digital signature σ = (c̃, z, h) of a message M with a secret key sk = (ρ, K, tr, s1, s2, t0) where ρ, K, tr are 256 bits binary values, s1 and s2 are vectors of length l, respectively k, of elements of the ring Rq whose coefficients are lower than a first predetermined value η, and t0 is a polynomial vector of length k with k, l, n and q integers, said Crystals-Dilithium post-quantum digital signature generation comprising :
a) generating (S1) a masking vector y, of length l, of polynomials with coefficients less than a second predetermined value γ1,
b) computing (S2) a first vector of polynomials, of length k, w = Ay, where A is a k × l matrix each of whose entries is a polynomial in the ring Rq = Zq[X]/(Xn + 1),
c) determining (S3) a second vector of polynomials w1 and a third vector of polynomials w0, both of length k, where every polynomial coefficient wi in Ay, with i in 0, ..., k-1, is written as wi = w1i · 2γ2 + w0i where |w0i| ≤ γ2 with γ2 a third predetermined value,
d) generating (S4) a challenge c based on the message and the second vector of polynomials w1,
e) performing rejection tests (S5) comprising testing if test vectors generated from said vectors, said challenge and said secret key fulfill predetermined conditions, and when said conditions are not fulfilled, restarting the signature generation from step a), else generating said signature, the steps a), b), c), d), and e) being repeated until the conditions are satisfied,
wherein performing rejection tests (S5) comprises :
- following said determination of said third vector of polynomials w0, generating a first test vector r0 as w0-cs2, and checking whether said first test vector r0 fulfills a first condition,
- when said first condition is met, generating a second test vector z= y + cs1, and checking whether said second test vector z fulfills a second condition, and wherein, when said second condition is met, said signature is generated from said second test vector.

6. 发明授权

EP3642820B1 COMPUTING DEVICE PROCESSING EXPANDED DATA 有权转让
公开(公告)号：EP3642820B1
公开(公告)日：2024-08-28
申请号：EP18730829.1
申请日：2018-06-20
IPC分类号： G09C1/00 , H04L9/00
CPC分类号： G09C1/00 , H04L9/003 , H04L2209/04620130101 , H04L2209/12520130101 , H04K3/825

7. 发明公开

EP4387160A1 SYSTEMS AND METHODS FOR BLOCKING DECRYPTION CAPABILITIES IN SYMMETRIC KEY ENCRYPTION 审中-公开
公开(公告)号：EP4387160A1
公开(公告)日：2024-06-19
申请号：EP23182415.2
申请日：2023-06-29
申请人： Intuit Inc.
发明人： VALD, Margarita , ZARUBINSKY, Julia , SHEFFER, Yaron , BANSHATS, Sergey
IPC分类号： H04L9/08
CPC分类号： H04L9/088 , H04L9/0861 , H04L2209/04620130101
摘要： Systems and methods that may be used to provide policies and protocols for blocking decryption capabilities in symmetric key encryption using a unique protocol in which key derivation may include injecting a random string into each key derivation. For example, a policy may be assigned to each client device indicating whether the client device has been assigned encryption only permission or full access permission to both encrypt and decrypt data. The disclosed protocol prevents client devices with encryption only permission from obtaining keys for decryption.

8. 发明公开

EP4343591A3 AUTHENTICATION SYSTEM USING SECURE MULTI-PARTY COMPUTATION 审中-实审
公开(公告)号：EP4343591A3
公开(公告)日：2024-06-19
申请号：EP24156945.8
申请日：2017-03-24
申请人： Visa International Service Association
发明人： Wagner, Kim R. , Sheets, John F.
IPC分类号： G06F21/31 , G06F21/41 , G06F21/45 , H04L9/32 , G06F21/12 , H04L9/40
CPC分类号： G06F21/31 , H04L9/3231 , H04L9/3236 , H04L2209/04620130101 , H04L2209/5020130101 , G06F21/125 , H04L2209/1620130101 , H04L2209/4620130101 , H04L63/0861
摘要： The invention is directed to a system that enables an authentication process that involves secure multi-party computation. The authentication process can be performed between a user device operated by a user and an access device. The user device and the access device may conduct the authentication process such that enrollment information and authentication information input by the user is not transmitted between the devices. Instead, the user device may determine and utilize obfuscated values associated with the authentication information. The user device may also determine an obfuscated authentication function that can be utilized to determine an authentication result without revealing enrollment information and authentication information associated with the user. The user can be authenticated based on the authentication result.

9. 发明授权

EP3776305B1 USING CRYPTOGRAPHIC BLINDING FOR EFFICIENT USE OF MONTGOMERY MULTIPLICATION 有权转让
公开(公告)号：EP3776305B1
公开(公告)日：2024-09-18
申请号：EP19778093.5
申请日：2019-03-26
IPC分类号： H04L9/32 , H04L9/00 , G06F21/60
CPC分类号： G06F21/602 , H04L9/003 , H04L9/3249 , H04L2209/1220130101 , H04L2209/04620130101

10. 发明公开

EP4420240A1 SECURE MULTI-RAIL CONTROL FOR SPARSELY ENCODED SIGNALS 审中-实审
公开(公告)号：EP4420240A1
公开(公告)日：2024-08-28
申请号：EP22847213.0
申请日：2022-12-02
申请人： Google LLC
发明人： VOGEL, Pirmin Robert , GORI, Christopher
IPC分类号： H03M13/19 , H03M13/21 , H04L9/00
CPC分类号： H03M13/19 , H03M13/21 , H03M13/05 , H04L9/0631 , H04L9/3247 , H04L2209/04620130101

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式