Pseudo-random number generator and communication system employin

Details Pseudo-random number generator and communication system employin Pseudo-random number generator and communication system employin

1995-03-13

1998-10-27

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

36471701, H04K 900, G06F 758

Patent

active

058287523

ABSTRACT:
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.

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