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    • 6. 发明授权
    • System and method for providing dynamically authorized access to functionality present on an integrated circuit chip
    • 用于提供对集成电路芯片上存在的功能的动态授权访问的系统和方法
    • US07818574B2
    • 2010-10-19
    • US10938808
    • 2004-09-10
    • Camil FayadJohn K. LiSiegfried Sutter
    • Camil FayadJohn K. LiSiegfried Sutter
    • H04L9/32
    • G06F21/72G06F2221/2115H04L9/3263H04L2209/56
    • A mechanism is provided in which access to the functionality present on an integrated circuit chip is controllable via an encrypted certificate of authority which includes time information indicating allowable periods of operation or allowable duration of operation. The chip includes at least one cryptographic engine and at least one processor. The chip also contains hard coded cryptographic keys including a chip private key, a chip public key and a third party's public key. The chip is also provided with a battery backed up volatile memory which contains information which is used to verify authority for operation. The certificate of authority is also used to control not only the temporal aspects of operation but is also usable to control access to certain functionality that may be present on the chip, such as access to some or all of the cryptographic features provided in conjunction with the presence of the cryptographic engine, such as key size.
    • 提供了一种机制,其中通过加密的授权证书来控制存在于集成电路芯片上的功能,其包括指示允许的操作周期或允许的操作持续时间的时间信息。 该芯片包括至少一个加密引擎和至少一个处理器。 该芯片还包含硬编码密码密钥,包括芯片私钥,芯片公钥和第三方的公钥。 该芯片还配有电池备份的易失性存储器,其中包含用于验证操作权限的信息。 授权证书也不仅用于控制操作的时间方面,而且还可用于控制对可能存在于芯片上的某些功能的访问,诸如访问与结合在一起提供的一些或全部密码特征 加密引擎的存在,如密钥大小。