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1. 发明授权

US5351293A System method and apparatus for authenticating an encrypted signal 失效
标题翻译：用于认证加密信号的系统方法和装置
公开(公告)号：US5351293A
公开(公告)日：1994-09-27
申请号：US11883
申请日：1993-02-01
申请人： John R. Michener , Benjamin Samit
发明人： John R. Michener , Benjamin Samit
IPC分类号： H04L9/08 , H04L9/32 , H04L9/00 , H03K3/84
CPC分类号： H04L9/3271 , H04L9/0822 , H04L2209/56
摘要： A cryptographic communications system includes a method and apparatus for exchanging messages between a user terminal, containing a secret key, and an operations center wherein each party authenticates signals received from the other party before any other information is exchanged. An initial identification message from the user terminal to the operations center contains an encrypted value of current time. The operations center checks the received message against local time to verify real time concurrent operation of the user terminal. Subsequently, the operations center and the user terminal mutually exchange encrypted challenge blocks, and each provide respective encrypted responses to the encrypted challenge blocks. The challenge and response exchanges demonstrate that each knows the secret key stored in the user terminal before other information, such as downloaded credit or uploaded data usage, is exchanged. In particular, the challenge and response messages exchange a first random number generated in the user terminal and a second random number generated in the operations center, which are variables used in conjunction with the user secret key to generate a new session key for encrypting the remainder of the messages exchanging data in the communication session.
摘要翻译：密码通信系统包括用于在包含秘密密钥的用户终端和操作中心之间交换消息的方法和装置，其中在交换任何其他信息之前，每一方认证从对方接收的信号。从用户终端到操作中心的初始识别消息包含当前时间的加密值。操作中心根据本地时间检查接收到的消息，以验证用户终端的实时并发操作。随后，操作中心和用户终端相互交换加密的挑战块，并且每个提供对加密的挑战块的各个加密的响应。挑战和响应交换表明，在交换其他信息（例如下载的信用或上传的数据使用）之前，每个人都知道存储在用户终端中的秘密密钥。特别地，挑战和响应消息交换在用户终端中生成的第一随机数和在操作中心中生成的第二随机数，其是与用户密钥一起使用的变量，以生成用于加密剩余部分的新的会话密钥在通信会话中交换数据的消息。

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