发明名称 |
Encryption apparatus, communication system using the same and method therefor |
摘要 |
In order to attain high speed and secure encryption, a communication apparatus comprises a random number generation circuit for sequentially generating random number sequences which assure difficulty in terms of amount of calculation in cryptoanalyzing the sequences based on output sequences while using a cryptographic key shared by partner stations as an initial value, and an encryption circuit for sequentially encrypting communication texts and outputting cryptograms in a transmitting station and sequentially cryptoanalyzing the cryptograms and outputting the same in a receiving station, faster than the sequential generation of the random numbers by the random number generation circuit.
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申请公布号 |
US5600720(A) |
申请公布日期 |
1997.02.04 |
申请号 |
US19940277512 |
申请日期 |
1994.07.19 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
IWAMURA, KEIICHI;YAMAMOTO, TAKAHISA |
分类号 |
H04L9/22;(IPC1-7):H04L9/26 |
主分类号 |
H04L9/22 |
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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