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    • 62. 发明授权
    • Managing device keys in cryptographic communication
    • 管理加密通信中的设备密钥
    • US07593528B2
    • 2009-09-22
    • US11853932
    • 2007-09-12
    • Kohichi KamijohMasaharu Sakamoto
    • Kohichi KamijohMasaharu Sakamoto
    • H04L9/12
    • H04L9/0836H04L2209/601
    • To delegate authority for cryptographic communication without increasing the risk of leaking a device key. A system and method including a first communication apparatus and a managing apparatus allowing the first communication apparatus to perform cryptographic communication with an external at least one second communication apparatus. The managing apparatus includes: storing a first device key shared with the second communication apparatus; generating a computation by passing the first device key read from the stored keys to a keyed one-way function, to generate a computed result as a second device key; and outputting the second device key and a key of the one-way function to the first communication apparatus. The first communication apparatus transmits a key of a one-way function to the second communication apparatus causing the second communication apparatus to perform a computation which generates a second device key, and which performs a cryptographic communication with a second communication apparatus.
    • 授权加密通信,而不增加泄漏设备密钥的风险。 一种包括第一通信装置和管理装置的系统和方法,其允许第一通信装置与外部至少一个第二通信装置执行密码通信。 管理装置包括:存储与第二通信装置共享的第一装置密钥; 通过将从所存储的密钥读取的第一设备密钥传递到键控单向功能来生成计算,以生成计算结果作为第二设备密钥; 以及将所述第二设备密钥和所述单向功能的密钥输出到所述第一通信设备。 第一通信装置向第二通信装置发送单向功能的密钥,使得第二通信装置执行产生第二装置密钥的计算,并且执行与第二通信装置的密码通信。