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    • 94. 发明授权
    • Digital signature method and system
    • 数字签名方法和系统
    • US08930704B2
    • 2015-01-06
    • US13443285
    • 2012-04-10
    • Liqun Chen
    • Liqun Chen
    • H04L9/32G06F21/62G06F21/64H04L9/08H04L29/06
    • G06F21/6254G06F21/64H04L9/0863H04L9/3247H04L63/0823H04L63/0853
    • A digital signature method, a method for initializing a digital signature scheme, a system for digitally signing a message and a computer program product are described. At least the digital signature method involves a signer having a weak security parameter. The signer retrieves a cryptographic element from each of a plurality of computing entities. Each cryptographic element is a function of a commitment supplied by the signer and the commitment includes a cryptographic function of a weak security parameter provided by the signer. A strong cryptographic security parameter is generated using a plurality of said elements. A message is then signed according to the digital signature scheme using the strong cryptographic security parameter to generate a digital signature.
    • 描述数字签名方法,初始化数字签名方案的方法,用于数字签名消息的系统和计算机程序产品。 至少数字签名方法涉及具有弱安全性参数的签名者。 签名者从多个计算实体中的每一个检索加密元素。 每个加密元素是由签名者提供的承诺的函数,承诺包括由签名者提供的弱安全性参数的加密功能。 使用多个所述元素生成强的加密安全参数。 然后使用强密码安全参数根据数字签名方案签署消息以生成数字签名。
    • 95. 发明授权
    • Extending an integrity measurement
    • 扩展完整性测量
    • US08850212B2
    • 2014-09-30
    • US13698235
    • 2011-05-12
    • Graeme John ProudlerLiqun Chen
    • Graeme John ProudlerLiqun Chen
    • G06F21/57G06F21/51G06F21/50G06F21/60G06F21/00
    • G06F21/57
    • A method of extending an integrity measurement in a trusted device operating in an embedded trusted platform by using a set of policy commands to extend a list of Platform Configuration Registers (PCRs) for the device and the current values of the listed PCRs and an integrity value identifying the integrity measurement into a policy register, verify a signature over the integrity value extended into the policy register, and, if verification succeeds, extend a verification key of the trusted platform, plus an indication that it is a verification key, into the policy register, compare the integrity value extended into the policy register with a value stored in the trusted platform, and, if they are the same: extend the stored value, plus an indication that it is a stored value, into the policy register, and extend the integrity measurement in the trusted device if the value in the policy register matches a value stored with the integrity measurement.
    • 一种通过使用一组策略命令扩展设备的平台配置寄存器(PCR)列表和所列出的PCR的当前值以及完整性值来扩展在嵌入式可信平台中操作的可信设备中的完整性测量的方法 将完整性测量识别到策略寄存器中,验证扩展到策略寄存器中的完整性值的签名,并且如果验证成功,则将可信赖平台的验证密钥加上其是验证密钥的指示加入策略 注册,将扩展到策略寄存器的完整性值与存储在可信平台中的值进行比较,如果相同:将存储的值加上存储值的指示加入策略寄存器,并扩展 如果策略寄存器中的值与完整性度量存储的值相匹配,则信任设备中的完整性度量。
    • 97. 发明授权
    • Object with identity based encryption
    • 具有基于身份的加密对象
    • US08732481B2
    • 2014-05-20
    • US13361850
    • 2012-01-30
    • Helen Y. BalinskyLiqun ChenSteven J Simske
    • Helen Y. BalinskyLiqun ChenSteven J Simske
    • G06F12/14H04L9/00
    • H04L9/3073G06F21/6209G06F2221/2107H04L9/0825H04L9/0866H04L9/3297
    • A workflow order is created for the object. Public parameters are received from a key generation center at a computer associated with an object master. A public key is generated at the computer system based on a user identifier and the public parameters, wherein the user identifier is comprised of user related information. The object is encrypted using the public key such that the object cannot be opened without the a private key, wherein the object is a composite document comprising multiple elements of documents of different formats, and wherein the private key is generated in response to a request from an authenticated user using the user identifier at the key generation center. Access to the multiple elements of the object is controlled based on workflow order.
    • 为对象创建工作流顺序。 从与对象主机相关联的计算机的密钥生成中心接收公共参数。 基于用户标识符和公共参数在计算机系统上生成公钥,其中用户标识符由用户相关信息组成。 使用公开密钥对对象进行加密,使得该对象不能在没有私钥的情况下被打开,其中对象是包括不同格式的多个文档元素的复合文档,并且其中响应于来自 在密钥生成中心使用用户标识符的认证用户。 基于工作流顺序控制对象的多个元素的访问。