发明名称 |
Encryption apparatus, communication system using the same and method therefor |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
EP0635956(B1) |
申请公布日期 |
2003.10.22 |
申请号 |
EP19940305221 |
申请日期 |
1994.07.15 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
IWAMURA, KEIICHI;YAMAMOTO, TAKAHISA |
分类号 |
H04L9/22;(IPC1-7):H04L9/22 |
主分类号 |
H04L9/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|