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    • 16. 发明授权
    • Electronic data protection system
    • 电子数据保护系统
    • US5392351A
    • 1995-02-21
    • US31339
    • 1993-03-15
    • Takayuki HasebeRyota AkiyamaMakoto Yoshioka
    • Takayuki HasebeRyota AkiyamaMakoto Yoshioka
    • G06F12/14G06F1/00G06F21/00G06F21/22G06F21/24G09C1/00G11B7/007H04L9/32
    • G06F12/1408G06F21/10G06F21/80G06F21/805G06F2221/0711G06F2221/2107G06F2221/2129G11B20/00347
    • An electronic data protection system for protecting electronic data from illegal copying by a third party, includes: a storage medium for storing an encrypted electronic data, a medium number and encrypted permission information; a vendor computer having a personal key generating unit for generating a medium key based on the medium number, an electronic data decrypting key, and an encrypting unit for encrypting the electronic data decrypting key based on the medium key to generate the encrypted permission information; and a user computer having a personal key generating unit for generating a medium key based on the medium number, a decrypting unit for decrypting the encrypted permission information based on the medium key to generate the electronic data decrypting key which is the same as the electronic data decrypting key of the vendor computer, and a decrypting unit for decrypting the encrypted electronic data based on the electronic data decrypting key to generate a plain text electronic data.
    • 一种用于保护电子数据免受第三方的非法复制的电子数据保护系统,包括:用于存储加密的电子数据,介质号和加密的许可信息的存储介质; 供应商计算机,其具有用于基于介质号生成介质密钥的个人密钥生成单元,电子数据解密密钥和用于基于所述介质密钥加密所述电子数据解密密钥的加密单元,以生成所述加密许可信息; 以及具有个人密钥生成单元的用户计算机,用于基于介质号生成介质密钥;解密单元,用于基于所述介质密钥解密所述加密许可信息,以生成与所述电子数据相同的电子数据解密密钥 解密密钥,以及解密单元,用于基于电子数据解密密钥解密加密的电子数据,以生成纯文本电子数据。