发明名称 |
CIPHER SYSTEM USING A VARIANT KEY MATRIX |
摘要 |
<p>This is a cipher system for enciphering or deciphering a stream of binary data by means of a product cipher. A clear message (16) represented in a binary data format is transformed into a cipher message or vice versa by operating on each consecutive bit of clear information with a complex modulo-two addition function (18). This function is dependent on previous internal cipher digits fedback (24) and varies for each message bit processed. The function is developed by continually shifting a key matrix (10) under the control of a varying control matrix (34). The control matrix is formed from the subproducts (24) of the complex function (18) developed in generating each cipher bit (22).</p> |
申请公布号 |
EP0035048(B1) |
申请公布日期 |
1985.03.06 |
申请号 |
EP19800101082 |
申请日期 |
1980.03.04 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
FEISTEL, HORST |
分类号 |
H04L9/18;(IPC1-7):H04L9/02 |
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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