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    • 8. 发明申请
    • DEVICE AND METHOD WITH REDUCED INFORMATION LEAKAGE
    • 具有减少信息泄漏的装置和方法
    • US20080222427A1
    • 2008-09-11
    • US12114024
    • 2008-05-02
    • Michael BaentschPeter BuhlerThomas EirichFrank HoeringMarcus OestreicherThomas D. Weigold
    • Michael BaentschPeter BuhlerThomas EirichFrank HoeringMarcus OestreicherThomas D. Weigold
    • H04L9/00
    • H04L63/04G06F21/76H04L9/003H04L9/0625H04L2209/12
    • The invention is directed to a data-processing system comprising a processor and first encrypted information in a first persistent memory whose level of information leakage is higher than that of a second persistent memory. In the second persistent memory is stored a first cryptographic key for decrypting the first encrypted information, thereby generating therefrom first unencrypted information that is usable by the processor for executing an operation. The same cryptographic key may also be used for encrypting the first unencrypted information, thereby generating the first encrypted information. It is also directed to a method of processing such a data-processing system with an operating system, comprising a writing step for writing first unencrypted information into the first persistent memory, an encryption step for encrypting the first unencrypted information under use of the first cryptographic key, creating therefrom first encrypted information in the first persistent memory, and an access-limitation step for setting the data-processing system to a state in which writing into the first persistent memory is controlled by the operating system. It also relates to a method of executing an operation on such a data-processing system comprising a decryption step for decrypting the first encrypted information under use of the first cryptographic key, thereby generating therefrom first unencrypted information and an execution step for executing an operation by the processor, using the first unencrypted information.
    • 本发明涉及一种数据处理系统,包括处理器和第一持久存储器中的第一加密信息,其信息泄漏级别高于第二持久存储器。 在第二持久存储器中存储用于解密第一加密信息的第一密码密钥,由此产生处理器可用于执行操作的第一未加密信息。 相同的加密密钥也可以用于加密第一未加密信息,从而生成第一加密信息。 还涉及一种使用操作系统处理这种数据处理系统的方法,包括用于将第一未加密信息写入到第一持久存储器中的写入步骤,用于在使用第一密码的情况下加密第一未加密信息的加密步骤 密钥,从第一永久存储器中创建第一加密信息,以及访问限制步骤,用于将数据处理系统设置为由操作系统控制对第一永久存储器的写入的状态。 它还涉及对这种数据处理系统执行操作的方法,包括解密步骤,用于在使用第一加密密钥的情况下对第一加密信息进行解密,由此产生第一未加密信息,以及执行步骤,用于执行操作, 处理器,使用第一个未加密的信息。