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51. 发明授权

EP2255532B1 METHOD AND APPARATUS FOR SELECTIVE DATA ENCRYPTION 失效
标题翻译： VEFAHREN和设备的选择性数据加密
公开(公告)号：EP2255532B1
公开(公告)日：2016-10-19
申请号：EP09702439.2
申请日：2009-01-16
申请人： Thomson Licensing
发明人： MASSOUDI, Ayoub , LEFEBVRE, Frederic , DURAND, Alain
IPC分类号： H04N7/16
CPC分类号： H04N7/1675 , H04N19/13 , H04N19/147 , H04N19/154 , H04N19/467 , H04N19/63 , H04N19/70 , H04N21/23476

52. 发明公开

EP2992641A1 DEVICE AND METHOD FOR TRACEABLE GROUP ENCRYPTION 审中-公开
标题翻译：设备和方法可操作的组加密
公开(公告)号：EP2992641A1
公开(公告)日：2016-03-09
申请号：EP14722628.6
申请日：2014-04-30
申请人： Thomson Licensing
发明人： JOYE, Marc , LIBERT, Benoît
IPC分类号： H04L9/32
CPC分类号： H04L9/3255 , H04L9/3013 , H04L63/0428 , H04L2209/606
摘要： A group encryption system (100) comprising at least one group member device (110), a group manager device (120), an opening authority device (130), a sender device (140) and a tracing agent device (150). The sender device (140) is configured to encrypt a plaintext using the public key of a group member. The group member device (110) is configured to receive and decrypt the ciphertext using the corresponding private key, and also to claim or disclaim a ciphertext. The opening authority device (130) is configured to disclose at least one user- specific trapdoor that makes it possible to trace, by the tracing agent device (150), all the ciphertexts for the specified user and only those ciphertexts.

53. 发明公开

EP2992638A1 THRESHOLD ENCRYPTION USING HOMOMORPHIC SIGNATURES 审中-公开
标题翻译：与同态签字阈值加密
公开(公告)号：EP2992638A1
公开(公告)日：2016-03-09
申请号：EP14722626.0
申请日：2014-04-29
申请人： Thomson Licensing
发明人： JOYE, Marc , LIBERT, Benoît
IPC分类号： H04L9/30 , H04L9/32
CPC分类号： H04L9/008 , H04L9/3073 , H04L9/3247 , H04L9/3255 , H04L2209/24 , H04L2209/72
摘要： A threshold encryption system comprising a sender device configured to generate ciphertexts and at least one entity device configured to perform partial decryption of ciphertexts. The system is based on Cramer-Shoup encryption systems and use linearly homomorphic signatures as publicly verifiable proofs of ciphertext validity.

54. 发明授权

EP2792098B1 GROUP ENCRYPTION METHODS AND DEVICES 有权
标题翻译：组加密方法和装置
公开(公告)号：EP2792098B1
公开(公告)日：2015-12-09
申请号：EP12798326.0
申请日：2012-12-11
申请人： Thomson Licensing
发明人： EL AIMANI, Laïla , JOYE, Marc
IPC分类号： H04L9/08 , H04L9/30 , H04L9/32
CPC分类号： H04L9/0838 , H04L9/0833 , H04L9/3073 , H04L9/3218 , H04L9/3255 , H04L2209/24

55. 发明公开

EP2930878A1 Paillier-based blind decryption methods and devices 审中-公开
标题翻译： BLINDE PAILLIERBASIERTEENTSCHLÜSSELUNGSVERFAHRENUND VORRICHTUNGEN
公开(公告)号：EP2930878A1
公开(公告)日：2015-10-14
申请号：EP15162535.7
申请日：2015-04-07
申请人： Thomson Licensing
发明人： Joye, Marc , Libert, Benoît
IPC分类号： H04L9/30
CPC分类号： H04L9/3006 , H04L9/008 , H04L9/302 , H04L2209/76
摘要： Paillier-based blind decryption. A user device (110) obtains (S10) a first Paillier Paillier ciphertext c for a message m, generates (S11) a blinded Paillier ciphertext c 0 by calculating c 0 = c mod N , sends (S12) the blinded Paillier ciphertext c 0 to a decryptor (120) and generates (S13) a first value ϱ 0 = c 0 - 1 mod N and a blinded plaintext m * = c ⁢ ϱ 0 mod N 2 - 1 N . The decryptor (120) generates (S15) a first key λ 0 from a private key λ , generates (S16) a second value ρ 0 = c 0 λ 0 mod N, generates (S17) a third value ϱ = ρ 0 N mod N 2 and, finally, generates (S18) a return value μ 1 = ϱ ⁢ c 0 mod N 2 - 1 N that is returned (S19) to the user device (110), which calculates (S20) the clear plaintext m = m * + µ 1 mod N . The clear plaintext m can then for example be output to a user or stored for later retrieval. Also provided is a generalized Paillier-based blind decryption.
摘要翻译：基于Paillier的盲解密。用户设备（110）获得（S10）消息m的第一Paillier Paillier密文c，通过计算c 0 = c mod N生成（S11）盲的Paillier密文c 0（S12）盲人Paillier密文c 0 到解密器（120），并产生（S13）第一值ñ0 = c 0 -1 mod N和盲文明文m * = c ñ0 mod N 2 -1 N。解密器（120）从私钥»生成（S15）第一密钥»0，生成（S16）第二值Á0 = c 0»0 mod N，生成（S17）第三值ñ=Á0 N mod N 2，最后生成（S18）向用户装置（110）返回（S19）的返回值¼1 =ñ ¢c 0 mod N 2 -1 N，其计算（S20）清除明文m = m * +μ1 mod N。然后，清楚的明文m可以例如被输出给用户或存储以供稍后检索。还提供了一种广义的基于Paillier的盲解密。

56. 发明公开

EP2907259A1 AGGREGATOR-OBLIVIOUS ENCRYPTION OF TIME-SERIES DATA 审中-公开
标题翻译：从非AGGREGATOR PENDING编码时间系列数据
公开(公告)号：EP2907259A1
公开(公告)日：2015-08-19
申请号：EP13786438.5
申请日：2013-10-11
申请人： Thomson Licensing
发明人： JOYE, Marc , LIBERT, Benoît
IPC分类号： H04L9/00 , H04L9/30
CPC分类号： H04L9/3093 , H04L9/008 , H04L9/3013 , H04L9/3066 , H04L2209/24 , H04L2209/46 , H04L2209/805
摘要： A processor (111) of a device (110) of user
i in an aggregator-oblivious encryption system with n users encrypts a message formula (I) where
t denotes a time period by generating an encrypted value c
i,t for the time period
t , by calculating formula (II) wherein H(
t ) is a hash function that hashes the time
t on to an element of a first group G
1 with order q
1 in which discrete logarithms are are calculable only non-polynomial time for a security parameter κ, wherein g1··· g
r is the base of a second group G2 = (g
1 , ···, g
r ) with order q
2 in which discrete logarithms are calculable in polynomial time, the first group G
1 and the second group G
2 both being different subgroups of a third group G, and wherein s
i is a key for user
i provided by a dealer so that an aggregator key formula (III) and outputs the encrypted value c
i,t to an aggregator (120). The aggregator obtains the sum X
t for time period
t by first computing formula (IV) and then formula (v), with formula (VI) for each formula (VII) as the unique representation of formula (VIII) with regard to basis (g
1 , ···, g
r ).

57. 发明公开

EP2905719A1 Device and method certificate generation 审中-公开
标题翻译： Vorrichtung und Verfahrenszertifikaterzeugung
公开(公告)号：EP2905719A1
公开(公告)日：2015-08-12
申请号：EP15152974.0
申请日：2015-01-29
申请人： Thomson Licensing
发明人： Karroumi, Mohamed , Courtay, Olivier
IPC分类号： G06F21/44 , G06F21/33 , G06F21/31
CPC分类号： H04L63/0823 , G06F21/31 , G06F21/33 , G06F21/445 , H04L9/3226 , H04L9/3247 , H04L9/3263 , H04L63/083
摘要： A device (110, 120) receives (S202) a password from a user, obtains (S204) a public key for a cryptographic algorithm for the device, obtains (S206) a password verifier by applying a one-way function to a combination of a unique identifier, the password and the public key, generates (S208) the certificate comprising the unique identifier, the public key and the password verifier, signs (S21 0) the certificate using a private key corresponding to the public key thereby obtaining a self-signed certificate, and outputs the self-signed certificate. Also provided is the device.
摘要翻译：设备（110,120）从用户接收（S202）密码，获得（S204）用于设备的密码算法的公开密钥，通过将单向功能应用于唯一标识符，密码和公开密钥，生成包括唯一标识符，公开密钥和密码验证者的证书（S208），使用与公开密钥相对应的私钥对证书进行签名（S21 0），从而获得自身并输出自签名证书。还提供了设备。

58. 发明公开

EP2824868A1 Réseau numérique local, procédés d'installation de nouveux dispositifs et procédés de diffusion et de réception de données dans un tel réseau 审中-公开
标题翻译：本地数字网络，安装新的设备和数据传输和接收方法的方法在这样的网络
公开(公告)号：EP2824868A1
公开(公告)日：2015-01-14
申请号：EP14176824.2
申请日：2002-08-23
申请人： Thomson Licensing
发明人： Andreaux, Jean-Pierre , Diehl, Eric , Durand, Alain
IPC分类号： H04L9/08 , H04N7/167 , H04L29/06
CPC分类号： H04L63/0435 , H04L9/0822 , H04L9/088 , H04L9/3239 , H04L63/0428 , H04L2209/601 , H04N7/1675 , H04N21/4181 , H04N21/4345 , H04N21/43615 , H04N21/4367 , H04N21/4405 , H04N21/4408 , H04N21/4623
摘要： L'invention concerne un réseau numérique local comprenant:
- au moins un dispositif source (1) destiné à diffuser des données (60) sur le réseau; et
- au moins un dispositif récepteur (2) destiné à recevoir lesdites données (60).
Le dispositif source (1) utilise une clé de chiffrement du réseau active (Kn[0]) pour chiffrer des données susceptibles d'être diffusées dans le réseau et le dispositif récepteur (2) contient :
- une clé de déchiffrement du réseau active (Kn[0]) pour déchiffrer des données chiffrées en utilisant ladite clé de chiffrement active et
- au moins une clé de déchiffrement du réseau (Kn[i]) pour déchiffrer des données chiffrées à l'aide d'une clé de chiffrement utilisée antérieurement dans le réseau.
L'invention concerne également l'installation de nouveaux dispositifs dans un tel réseau ainsi que la transmission de données d'un dispositif source à un dispositif récepteur.

59. 发明授权

EP2555472B1 Method and device for reliable estimation of network traffic 有权
标题翻译：网络流量的可靠估计的方法和设备
公开(公告)号：EP2555472B1
公开(公告)日：2014-10-22
申请号：EP12178779.0
申请日：2012-08-01
申请人： Thomson Licensing
发明人： Courtay, Olivier , Heen, Olivier
IPC分类号： H04L12/26 , H04L29/06 , H04L12/24
CPC分类号： H04W24/00 , H04L12/66 , H04L43/062 , H04L43/0876 , H04L63/1408

60. 发明公开

EP2775657A1 Device for generating an encrypted key and method for providing an encrypted key to a receiver 审中-公开
标题翻译：装置，用于产生用于提供加密的密钥给接收器的加密的密钥和方法
公开(公告)号：EP2775657A1
公开(公告)日：2014-09-10
申请号：EP14157347.7
申请日：2014-02-28
申请人： Thomson Licensing
发明人： Desmicht, Eric , Courtay, Olivier , Rigal, Renaud
IPC分类号： H04L9/08 , H04L29/06
CPC分类号： H04L9/0861 , H04L9/0822 , H04L9/0866 , H04L2209/603
摘要： A device (100) for generating an encrypted master key. The device (100) comprises at least one input interface configured to receive a receiver identifier (STB i ), a service provider identifier (Id(k)) and a master key (Km j,k ) for the service provider; a memory configured to store a secret of the device; a processor configured to: process the receiver identifier using the secret to obtain a root key (Kr i ), process the service provider identifier using the root key to obtain a top key (Kt i,k ) and process the master key using the top key to obtain an encrypted master key (W(i,k)); and an output interface configured to output the encrypted master key. Also provided is a method for providing an encrypted master key to a receiver. An advantage is that the device can enable a new service provider to provide services to a receiver using an already deployed smartcard.

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