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    • 3. 发明授权
    • Combination white box/black box cryptographic processes and apparatus
    • 组合白盒/黑匣子加密处理和装置
    • US08165286B2
    • 2012-04-24
    • US12061363
    • 2008-04-02
    • Mathieu CietAugustin J. FarrugiaJean-Francois Riendeau
    • Mathieu CietAugustin J. FarrugiaJean-Francois Riendeau
    • H04K1/00H04L9/00H04L9/28H04L29/06G06F17/00
    • H04L9/002H04L9/3066H04L2209/16H04L2209/603
    • Method and apparatus for increasing security of a cryptographic algorithm such as deciphering, enciphering, or a digital signature. A cryptographic algorithm and a key are provided such that a deciphering process, for instance, is partitioned between two portions. The portion of the cryptographic algorithm carried out in the first portion is implemented in a “white box” model such that it is highly secure even against an attack by the user who has full access to internal operations, code execution and memory of the user device, such as a hacker or attacker. The remaining portion of the algorithm is carried out in the second portion. Since this second portion has relaxed security constraints, its code may be implemented using a “black box” approach where its code execution may be more efficient and faster, not requiring the code obfuscation of the white box implementation in the user device. This partitioning may be achieved using a delegation protocol. The chief advantage is that even given a limited code size for the cryptographic process, the security of the system is improved by carrying out the more computationally intensive functions more efficiently in the black box portion and executing the less computationally intensive function in the white box portion.
    • 用于提高加密算法的安全性的方法和装置,例如解密,加密或数字签名。 提供了一种加密算法和密钥,使得例如在两部分之间进行解密处理。 在第一部分中执行的加密算法的部分被实现在“白盒”模型中,使得即使对于完全访问内部操作,代码执行和用户设备的存储器的用户的攻击也是非常安全的 ,如黑客或攻击者。 算法的剩余部分在第二部分中进行。 由于该第二部分具有放松的安全约束,因此其代码可以使用“黑箱”方法来实现,其中其代码执行可能更有效和更快,而不需要用户设备中的白盒实现的代码混淆。 可以使用委托协议来实现该分区。 主要的优点是,即使给出密码过程的有限的代码大小,通过在黑盒部分中更有效地执行更多的计算密集型函数,并且在白盒部分中执行较少的计算密集型函数来提高系统的安全性 。
    • 6. 发明申请
    • COMBINATION WHITE BOX/BLACK BOX CRYPTOGRAPHIC PROCESSES AND APPARATUS
    • 组合白盒/黑盒CRYPTOGRAPHIC PROCESSES AND APPARATUS
    • US20090252327A1
    • 2009-10-08
    • US12061363
    • 2008-04-02
    • Mathieu CietAugustin J. FarrugiaJean-Francois Riendeau
    • Mathieu CietAugustin J. FarrugiaJean-Francois Riendeau
    • H04L9/06
    • H04L9/002H04L9/3066H04L2209/16H04L2209/603
    • Method and apparatus for increasing security of a cryptographic algorithm such as deciphering, enciphering, or a digital signature. A cryptographic algorithm and a key are provided such that a deciphering process, for instance, is partitioned between two portions. The portion of the cryptographic algorithm carried out in the first portion is implemented in a “white box” model such that it is highly secure even against an attack by the user who has full access to internal operations, code execution and memory of the user device, such as a hacker or attacker. The remaining portion of the algorithm is carried out in the second portion. Since this second portion has relaxed security constraints, its code may be implemented using a “black box” approach where its code execution may be more efficient and faster, not requiring the code obfuscation of the white box implementation in the user device. This partitioning may be achieved using a delegation protocol. The chief advantage is that even given a limited code size for the cryptographic process, the security of the system is improved by carrying out the more computationally intensive functions more efficiently in the black box portion and executing the less computationally intensive function in the white box portion.
    • 用于提高加密算法的安全性的方法和装置,例如解密,加密或数字签名。 提供了一种加密算法和密钥,使得例如在两部分之间进行解密处理。 在第一部分中执行的加密算法的部分被实现在“白盒”模型中,使得即使对于完全访问内部操作,代码执行和用户设备的存储器的用户的攻击也是非常安全的 ,如黑客或攻击者。 算法的剩余部分在第二部分中进行。 由于该第二部分具有放松的安全约束,因此其代码可以使用“黑箱”方法来实现,其中其代码执行可能更有效和更快,而不需要用户设备中的白盒实现的代码混淆。 可以使用委托协议来实现该分区。 主要的优点是,即使给出密码过程的有限的代码大小,通过在黑盒部分中更有效地执行更多的计算密集型函数,并且在白盒部分中执行较少的计算密集型函数来提高系统的安全性 。
    • 10. 发明申请
    • DEVICE-INDEPENDENT MANAGEMENT OF CRYPTOGRAPHIC INFORMATION
    • 独立管理信息的设备独立性
    • US20130003977A1
    • 2013-01-03
    • US13474697
    • 2012-05-17
    • Augustin J. FarrugiaGianpaolo FasoliJean-Francois Riendeau
    • Augustin J. FarrugiaGianpaolo FasoliJean-Francois Riendeau
    • H04L9/08
    • Some embodiments provide an account-based DRM system for distributing content. The system includes several devices that are associated with an account and a set of DRM computers that receives a request to access a piece of content on the devices associated with the account. The DRM computer set then generates a several keys for the devices, where each particular key of each particular device allows the particular device to access the piece of content on the particular device. In some embodiments, the DRM computer set sends the content and keys to one device (e.g., a computer), which is used to distribute the content and the key(s) to the other devices associated with the account. In some embodiments, the DRM computer set individually encrypts each key in a format that is used during its transport to its associated device and during its use on this device.
    • 一些实施例提供用于分发内容的基于帐户的DRM系统。 该系统包括与帐户相关联的若干设备和一组DRM计算机,其接收访问与该帐户相关联的设备上的一条内容的请求。 DRM计算机组然后生成用于设备的几个密钥,其中每个特定设备的每个特定密钥允许特定设备访问特定设备上的内容。 在一些实施例中,DRM计算机组将内容和密钥发送到一个设备(例如,计算机),其用于将内容和密钥分发到与该帐户相关联的其他设备。 在一些实施例中,DRM计算机集合以其在其传输到其关联设备期间以及在其在该设备上的使用期间使用的格式单独地加密每个密钥。