发明名称 |
Pseudo-random number generator, and communication method and apparatus using encrypted text based upon pseudo-random numbers generated by said generator. |
摘要 |
A communication apparatus through which encryption/decryption processing can be executed at high speed includes a CPU for performing overall control of the apparatus, an encryption unit for encrypting communication data that has been stored in a RAM and outputting encrypted data, and a decryption unit for decrypting encrypted data transmitted from an external communication apparatus and storing the decrypted data in the RAM. The decryption unit issues a request to generate a series of random numbers serving as an encryption key necessary in decryption processing of the encrypted data applied thereto. A pseudo-random number generating circuit generates random numbers and delivers them to the decryption unit. The encryption unit issues a request to generate a series of random numbers serving as an encryption key necessary in encryption. The pseudo-random number generating circuit generates random numbers and delivers them to the encryption unit. The latter generates a cryptogram sentence based upon these random numbers. <IMAGE> |
申请公布号 |
EP0673134(A3) |
申请公布日期 |
1996.08.07 |
申请号 |
EP19950301682 |
申请日期 |
1995.03.14 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
IWAMURA, KEIICHI;YAMAMOTO, TAKAHISA |
分类号 |
G09C1/00;H04L9/22 |
主分类号 |
G09C1/00 |
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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