发明名称 |
Apparatus and method for effecting a key change via a cryptographically protected link |
摘要 |
Messages sent from an earth station to a satellite by a command link are authenticated within the satellite before being executed. Authentication is accomplished by comparing a codeword appended to the message to a codeword generated within the satellite. This codeword is a cryptographic function of the message data and a secret operating key. A key change command from the earth station causes the satellite authenticator to generate a new operating key based a secret master key, a supplemental private code, and a publicly available initialization vector. The codeword appended to the key change command is encrypted in the new key and, if it agrees with a codeword generated by the satellite authenticator, the new key becomes the operating key and the key change function is complete. |
申请公布号 |
US4688250(A) |
申请公布日期 |
1987.08.18 |
申请号 |
US19860823537 |
申请日期 |
1986.01.29 |
申请人 |
RCA CORPORATION |
发明人 |
CORRINGTON, DONALD G.;HAWKINS, STEPHEN D.;SABLE, DANIEL M. |
分类号 |
H04B7/185;H04L9/00;H04L9/06;H04L9/08;H04L9/14;(IPC1-7):H04L9/02 |
主分类号 |
H04B7/185 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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