发明名称 |
Arrangement for ciphering and deciphering of information |
摘要 |
An arrangement for ciphering and deciphering comprises a number of cycle length counters. Each of the counters has a different cycle length and generates a series of bits by scanning associated memory fields containing internal-key-information. The series of bits are combined in a logical unit in order to obtain a ciphered series. The arrangement includes a plurality of memories each comprising a number of memory fields corresponding to the number of counters. Switches are arranged to select internal-key-information by selecting memory fields from different memories depending on a control device, which is operated by certain character combinations in the transmitted text on the sender side and on the receiver side of the system.
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申请公布号 |
US4058673(A) |
申请公布日期 |
1977.11.15 |
申请号 |
US19750616490 |
申请日期 |
1975.09.24 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
JOHANSSON, SVEN TORILD KRUSE |
分类号 |
H04L9/18;H04L9/22;(IPC1-7):H04L9/04 |
主分类号 |
H04L9/18 |
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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