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    • 1. 发明授权
    • Communication apparatus, key server, and data
    • 通信设备,密钥服务器和数据
    • US08548169B2
    • 2013-10-01
    • US12401701
    • 2009-03-11
    • Toru KambayashiTatsuyuki MatsushitaHaruhiko ToyamaToshinori Odaka
    • Toru KambayashiTatsuyuki MatsushitaHaruhiko ToyamaToshinori Odaka
    • H04L29/06
    • H04L9/0897H04L9/3297H04L2209/603
    • A communication apparatus that encrypts a plurality of pieces that constitute a part of data and transmits the encrypted pieces stores an encrypted piece that is one of the pieces encrypted by another communication apparatus, and first decryption key information used for decrypting the encrypted piece, while keeping the encrypted piece and the first decryption key information in correspondence with each other. Further, the communication apparatus generates temporary information that can be different at each time of generation, further performs an encrypting process on the encrypted piece based on the temporary information, and outputs a new encrypted piece. The communication apparatus transmits the new encrypted piece, the first decryption key information that is stored in correspondence with the encrypted piece, and second decryption key information used for decrypting the encrypting process.
    • 对构成数据的一部分的多个片段进行加密并发送加密件的通信装置存储作为由另一通信装置加密的片段之一的加密片,以及用于解密加密片的第一解密密钥信息,同时保持 加密件和第一解密密钥信息彼此对应。 此外,通信装置生成在每次生成时可以不同的临时信息,还根据临时信息进行对加密件的加密处理,并输出新的加密件。 通信装置发送新的加密件,与加密件对应地存储的第一解密密钥信息和用于解密加密处理的第二解密密钥信息。