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1. 发明授权

US08526614B2 Method to manage members of at least one group of decoders having access to broadcast data 有权
标题翻译：管理具有访问广播数据的至少一组解码器的成员的方法
公开(公告)号：US08526614B2
公开(公告)日：2013-09-03
申请号：US13020650
申请日：2011-02-03
申请人： Guy Moreillon , Alexandre Karlov
发明人： Guy Moreillon , Alexandre Karlov
IPC分类号： H04L12/22 , H04L9/32 , H04L9/00 , H04L9/28 , H04N7/167 , H04K1/00 , H04L9/08 , H04L9/30
CPC分类号： H04W12/00 , G11B20/00086 , G11B20/0021 , H04L9/0833 , H04L9/0836 , H04L9/0891 , H04L2209/601 , H04N7/1675 , H04N21/2347 , H04N21/2585 , H04N21/26606 , H04N21/4182 , H04N21/4405 , H04N21/63345
摘要： A method to manage members of a group of decoders having access to broadcast data, each group member sharing a common broadcast encryption scheme (BES) comprising the steps of, in a stage for a decoder to become a group member, receiving keys pertaining to the position in the group according to the BES, receiving a current group access data comprising a current group access key, and in a stage of accessing broadcast data, using the current group access data to access the broadcast data, and in a stage of renewing the current group access key, sending a first group message comprising at least a next group access key encrypted so that only non-revoked decoders can access it, said group message being further encrypted by the current group access key, updating the current group access key with the next group access key.
摘要翻译：一种管理具有访问广播数据的解码器组的成员的方法，每个组成员共享公共广播加密方案（BES），包括以下步骤：在解码器成为组成员的阶段中，接收与根据BES在组中的位置，接收包括当前组访问密钥的当前组访问数据，并且在访问广播数据的阶段中，使用当前组访问数据访问广播数据，并且在更新当前组访问密钥，发送包括至少加密的下一个组访问密钥的第一组消息，使得只有非撤销解码器可以访问它，所述组消息被当前组访问密钥进一步加密，用当前组访问密钥更新当前组访问密钥下一组访问密钥。

2. 发明申请

US20120224692A1 METHOD FOR PUBLIC-KEY ATTRIBUTE-BASED ENCRYPTION WITH RESPECT TO A CONJUNCTIVE LOGICAL EXPRESSION 有权
标题翻译：基于连续逻辑表达式的基于公共密钥属性加密的方法
公开(公告)号：US20120224692A1
公开(公告)日：2012-09-06
申请号：US13510530
申请日：2010-11-19
申请人： Alexandre Karlov , Pascal Junod
发明人： Alexandre Karlov , Pascal Junod
IPC分类号： H04K1/00
CPC分类号： H04L9/3073 , H04L2209/601 , H04L2209/606
摘要： The aim of the present invention is to propose a method for providing attribute-based encryption for conjunctive normal form (CNF) expressions, the said CNF expression comprising at least one clause over a set of attributes, the said method using a key generation engine, an encryption engine and a decryption engine.
摘要翻译：本发明的目的是提出一种用于为联合正常形式（CNF）表达提供基于属性的加密的方法，所述CNF表达包括一组属性中的至少一个子句，所述方法使用密钥生成引擎，加密引擎和解密引擎。

3. 发明申请

US20090208010A1 System for traceable decryption of bandwidth-efficient broadcast of encrypted messages and security module revocation method used for securing broadcasted messages 有权
标题翻译：用于可加密消息的带宽高效广播的可追溯解密系统和用于保护广播消息的安全模块吊销方法
公开(公告)号：US20090208010A1
公开(公告)日：2009-08-20
申请号：US12382354
申请日：2009-03-13
申请人： Pascal Junod , Alexandre Karlov , Nicolas Fischer
发明人： Pascal Junod , Alexandre Karlov , Nicolas Fischer
IPC分类号： H04N7/167 , H04L9/20 , H04L9/08
CPC分类号： H04N7/1675 , G06F21/10 , H04L63/0442 , H04L63/065 , H04L63/10 , H04L2463/101 , H04N21/2347 , H04N21/2585 , H04N21/4181 , H04N21/4623
摘要： The present invention makes use of techniques such as those described by Boneh and Franklin to allow for the realisation of a pseudo-asymmetric encryption scheme whereby one public encryption corresponds to a plurality of private decryption keys. This scheme therefore provides a solution to the problem of inefficient use of bandwidth in asymmetrical encryption schemes which inherently require that a plurality of encryptions of data be broadcast to a plurality of receivers. The invention further ensures that the advantage of traceability, typical found in asymmetric encryption schemes, is maintained due to the characteristic that each receiver uses a unique traceable decryption key. The traceability thus achieved by the present invention allows for the revocation of a security module which has been involved in the abusive use of conditional access data, particularly by means of clones of security modules whose security has been compromised.
摘要翻译：本发明利用诸如由Boneh和Franklin描述的技术来允许实现伪非对称加密方案，由此一个公共加密对应于多个私有解密密钥。因此，该方案提供了在非对称加密方案中无效使用带宽问题的解决方案，其固有地要求将多个数据加密广播到多个接收机。本发明进一步确保了由于每个接收机使用唯一的可追溯解密密钥的特性，维持了非对称加密方案中典型的可追溯性的优点。通过本发明实现的可跟踪性允许撤销参与滥用条件访问数据的安全模块，特别是通过其安全性被破坏的安全模块的克隆。

4. 发明授权

US08934626B2 Method to manage revocations in a group of terminals 有权
标题翻译：管理一组终端的撤销方法
公开(公告)号：US08934626B2
公开(公告)日：2015-01-13
申请号：US13520771
申请日：2011-03-01
申请人： Alexandre Karlov
发明人： Alexandre Karlov
IPC分类号： H04L9/00 , G06F21/10 , H04L9/08 , H04N7/167
CPC分类号： G06F21/10 , G06F2221/0753 , H04L9/0833 , H04L9/0836 , H04L2209/601 , H04N7/1675 , H04N21/2347 , H04N21/2585 , H04N21/26613
摘要： The present invention concerns the field of broadcast encryptionmethod, i.e. a method to organize the distribution of keys into a group of users so that it is possible to manage the revocation of one member of the group in an efficient way. The proposed solution is a private encryption key ciphertext constant collusion-resistant broadcast encryption. The main idea behind the invention is to mix the notion of efficient tree-based key derivation (also called subset management) with individual and personalized key blinding thus achieving a full collusion-resistant broadcast encryption system. The key de-blinding is performed at the last moment thanks to a cryptographic technique called pairings (also known as bilinear maps) resulting in a global key commonly shared by all authorized (non-revoked) devices. It should be noted that only non-revoked devices can compute the final key (this is achieved through subset management and related subset key derivation technique) and perform the de-blinding (which is performed with one pairing).
摘要翻译：本发明涉及广播加密方法的领域，即一种将密钥分配到一组用户中的方法，使得可以以有效的方式管理该组中的一个成员的撤销。提出的解决方案是私有加密密钥密文常数串通防扩散加密。本发明的主要思想是将有效的基于树的密钥导出（也称为子集管理）的概念与个人和个性化的密钥盲法相结合，从而实现完全的防欺骗广播加密系统。由于称为配对（也称为双线性映射）的加密技术，导致所有授权（非撤销）设备通常共享的全局密钥，因此最后一刻执行关键的禁忌。应该注意的是，只有非撤销设备可以计算最终密钥（这通过子集管理和相关的子集密钥导出技术来实现），并执行去盲（用一对配对执行）。

5. 发明授权

US07936882B2 Method to trace traceable parts of original private keys in a public-key cryptosystem 有权
标题翻译：在公钥密码系统中跟踪原始私钥的可追溯部分的方法
公开(公告)号：US07936882B2
公开(公告)日：2011-05-03
申请号：US12016031
申请日：2008-01-17
申请人： Pascal Junod , Alexandre Karlov
发明人： Pascal Junod , Alexandre Karlov
IPC分类号： H04L9/30
CPC分类号： H04L9/304 , H04L2209/606
摘要： The aim of the present invention is to propose a very fast alternative mechanism to the traitor tracing algorithm introduced by Boneh and Franklin to trace private keys in a public-key cryptosystem. This invention concerns a method to trace traceable parts of original private keys in a public-key cryptosystem consisting of one public key and λ corresponding private keys, a private key being formed by a traceable array of 2k elements forming a syndrome of a generalized Reed-Solomon code with parameters (λ, λ-2k) defined by the base points {right arrow over (π)}=(π1, . . . , πλ) and a scaling vector {right arrow over (c)}=(c1, c2, . . . , cλ), comprising the steps of: obtaining the traceable part {right arrow over (d)}=(d1, . . . , d2k)T of a rogue private key, applying a Berlekamp-Massey algorithm on the traceable part {right arrow over (d)}=(d1, . . . , d2k)T of the rogue private key, to obtain the k coefficients of an error-locator polynomial, applying the Chien's search algorithm to the error-locator polynomial, to obtain roots of the error-locator polynomial, determining the base points of the traceable part of the original private keys by computing the arithmetic inverse of each root, these base points allowing to uniquely determine the private key.
摘要翻译：本发明的目的是提出一种非常快速的替代机制，即由Boneh和Franklin引入的跟踪私有密钥在公共密钥密码系统中的跟踪算法。本发明涉及一种在由一个公开密钥和λ个对应私钥组成的公开密钥密码系统中跟踪原始私有密钥的可追溯部分的方法，私有密钥由2k个元素的可追踪阵列形成，形成广义Reed- 由基点{right arrow over（＆pgr;）} =（＆pgr; 1，...，＆pgr;λ）定义的参数（λ，λ-2k）的所罗门码和缩放矢量{（c） } =（c1，c2，...，cλ），包括以下步骤：获得流氓私钥的可追溯部分{右箭头（d）} =（d1，...，d2k）T，在可追溯部分（右箭头（d）} =（d1，...，d2k）T上的流氓私钥的Berlekamp-Massey算法，以获得误差定位多项式的k个系数，应用Chien的搜索算法到误差定位器多项式，以获得误差定位多项式的根，通过计算算术来确定原始私钥的可跟踪部分的基点每个根的tic逆，这些基点允许唯一地确定私钥。

6. 发明授权

US08548167B2 System for traceable decryption of bandwidth-efficient broadcast of encrypted messages and security module revocation method used for securing broadcasted messages 有权
标题翻译：用于可加密消息的带宽高效广播的可追溯解密系统和用于保护广播消息的安全模块吊销方法
公开(公告)号：US08548167B2
公开(公告)日：2013-10-01
申请号：US12382354
申请日：2009-03-13
申请人： Pascal Junod , Alexandre Karlov , Nicolas Fischer
发明人： Pascal Junod , Alexandre Karlov , Nicolas Fischer
IPC分类号： H04N7/167 , H04L9/20 , H04L9/08
CPC分类号： H04N7/1675 , G06F21/10 , H04L63/0442 , H04L63/065 , H04L63/10 , H04L2463/101 , H04N21/2347 , H04N21/2585 , H04N21/4181 , H04N21/4623
摘要： The present invention makes use of techniques such as those described by Boneh and Franklin to allow for the realization of a pseudo-asymmetric encryption scheme whereby one public encryption corresponds to a plurality of private decryption keys. This scheme therefore provides a solution to the problem of inefficient use of bandwidth in asymmetrical encryption schemes which inherently require that a plurality of encryptions of data be broadcast to a plurality of receivers. The invention further ensures that the advantage of traceability, typical found in asymmetric encryption schemes, is maintained due to the characteristic that each receiver uses a unique traceable decryption key. The traceability thus achieved by the present invention allows for the revocation of a security module which has been involved in the abusive use of conditional access data, particularly by means of clones of security modules whose security has been compromised.
摘要翻译：本发明利用诸如由Boneh和Franklin描述的技术来允许实现伪非对称加密方案，由此一个公共加密对应于多个私有解密密钥。因此，该方案提供了在非对称加密方案中无效使用带宽问题的解决方案，其固有地要求将多个数据加密广播到多个接收机。本发明进一步确保了由于每个接收机使用唯一的可追溯解密密钥的特性，维持了非对称加密方案中典型的可追溯性的优点。通过本发明实现的可跟踪性允许撤销参与滥用条件访问数据的安全模块，特别是通过其安全性被破坏的安全模块的克隆。

7. 发明授权

US08306220B2 Method to generate a private key in a boneh-franklin scheme 有权
标题翻译：在一个骨干富兰克林方案中生成一个私钥的方法
公开(公告)号：US08306220B2
公开(公告)日：2012-11-06
申请号：US12016053
申请日：2008-01-17
申请人： Pascal Junod , Alexandre Karlov
发明人： Pascal Junod , Alexandre Karlov
IPC分类号： H04L9/00
CPC分类号： H04L9/3073 , H04L2209/08 , H04L2209/606
摘要： An alternative scheme to the classical Boneh-Franklin scheme simplifies the generation and the use of the asymmetric keys. The alternative scheme takes advantage of the discovery that simpler calculations resulting in exponents of reduced size can be used as part of Boneh-Franklin type scheme. The alternative scheme thus provides a traceable encryption scheme which allows for fast, secure cryptographic calculations to be made while providing the necessary level of security required for reliable tracing capabilities to be achieved.
摘要翻译：经典的Boneh-Franklin方案的另一种方案简化了非对称密钥的生成和使用。替代方案利用了发现，更简单的计算导致尺寸减小的指数可以用作Boneh-Franklin型方案的一部分。因此，替代方案提供了可跟踪的加密方案，其允许进行快速，安全的加密计算，同时提供实现可靠跟踪能力所需的必要级别的安全性。

8. 发明申请

US20090185676A1 METHOD TO GENERATE A PRIVATE KEY IN A BONEH-FRANKLIN SCHEME 有权
公开(公告)号：US20090185676A1
公开(公告)日：2009-07-23
申请号：US12016053
申请日：2008-01-17
申请人： Pascal Junod , Alexandre Karlov
发明人： Pascal Junod , Alexandre Karlov
IPC分类号： H04L9/06
CPC分类号： H04L9/3073 , H04L2209/08 , H04L2209/606
摘要： The aim of the present invention is to propose an alternative scheme to the classical Boneh-Franklin scheme in order to simplify the generation and the use of the asymmetric keys.According to the present invention, it is proposed a method to generate an i-th private key in a public key encryption scheme with traceable private keys formed by a public component γ(i) and a secret component θi, according to a maximal coalition factor k, with all arithmetic operations performed within a multiplicative group Z/qZ where q is a prime number,said public component being defined as: γ(i)pl =(1, i mod q, i2 mod q, . . . , ik-1 mod q) and said secret component being defined as: θ i = ∑ r j  α j ∑ r j  γ j ( i )  mod   q where rj and αj are random values in the group Z/Z.

9. 发明授权

US08681983B2 Method for public-key attribute-based encryption with respect to a conjunctive logical expression 有权
标题翻译：关于连接逻辑表达式的基于公钥属性的加密方法
公开(公告)号：US08681983B2
公开(公告)日：2014-03-25
申请号：US13510530
申请日：2010-11-19
申请人： Alexandre Karlov , Pascal Junod
发明人： Alexandre Karlov , Pascal Junod
IPC分类号： H04K1/00
CPC分类号： H04L9/3073 , H04L2209/601 , H04L2209/606
摘要： The aim of the present invention is to propose a method for providing attribute-based encryption for conjunctive normal form (CNF) expressions, the said CNF expression comprising at least one clause over a set of attributes, the said method using a key generation engine, an encryption engine and a decryption engine.
摘要翻译：本发明的目的是提出一种用于为联合正常形式（CNF）表达提供基于属性的加密的方法，所述CNF表达包括一组属性中的至少一个子句，所述方法使用密钥生成引擎，加密引擎和解密引擎。

10. 发明授权

US08634554B2 Method to enforce by a management center the access rules for a broadcast product 有权
标题翻译：由管理中心执行广播产品的访问规则的方法
公开(公告)号：US08634554B2
公开(公告)日：2014-01-21
申请号：US13119927
申请日：2009-09-16
申请人： Pascal Junod , Alexandre Karlov
发明人： Pascal Junod , Alexandre Karlov
IPC分类号： H04L29/06
CPC分类号： H04N7/1675 , H04N7/165 , H04N21/25833 , H04N21/4623 , H04N21/63345
摘要： A method to enforce by a management center access rules for a broadcast product accessed by an access key, the management center managing a plurality of Boolean positive and negative attributes, comprising the steps: associating one positive Boolean attribute to a receiver entitled to the attribute and loading the same; associating one negative Boolean attribute to a receiver not entitled to the attribute and loading the same; defining at least a second broadcast encryption scheme for the negative Boolean attributes and associating each negative Boolean attribute corresponding decryption key material; expressing access conditions on a product as a Boolean expression by combining at least one positive Boolean attribute and at least one negative Boolean attribute by at least one Boolean conjunction or disjunction; generating and broadcasting at least one cryptogram to a receiver, encrypting the access key with the two combined broadcast encryption schemes according to the Boolean expression.
摘要翻译：一种由管理中心执行访问密钥访问的广播产品的访问规则的方法，管理中心管理多个布尔正负属性，包括以下步骤：将一个正的布尔属性与被授予该属性的接收者相关联;以及加载相同; 将一个负的布尔属性关联到没有权限的属性并加载该属性的接收者; 为负布尔属性定义至少第二广播加密方案，并且将每个负布尔属性对应的解密密钥材料相关联; 通过将至少一个正布尔属性和至少一个负布尔属性组合至少一个布尔连接或分离来表示对产品的访问条件作为布尔表达式; 生成并向接收器发送至少一个密码，并根据布尔表达式使用两个组合广播加密方案加密访问密钥。

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