Communication system and communication method

Details Communication system and communication method Communication system and communication method

1997-02-28

2000-01-25

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 49, H04L 900

Patent

active

060185813

ABSTRACT:
A communication system can maintain high security in communication between a communication apparatus and a terminal. The communication system includes the communication apparatus and the terminal provided with a memory unit for storing data for specifying function of the communication apparatus. The communication apparatus and the terminal include random number generators for generating random numbers, encryption/decryption key preparing units for preparing encryption/decryption keys on the basis of both random numbers and generated by the respective random number generators of the communication apparatus and the terminal and a secret key held in common by the communication apparatus and the terminal, and encryption/decryption processing units for encrypting or decrypting communication data between the communication apparatus and the terminal containing the data by means of the encryption/description key, respectively.

REFERENCES:
patent: 4218582 (1980-08-01), Hellman et al.
patent: 4238854 (1980-12-01), Ehrsam et al.
patent: 5046094 (1991-09-01), Kawamura et al.
patent: 5596641 (1997-01-01), Ohashi et al.
patent: 5600720 (1997-02-01), Iwamura et al.
patent: 5787179 (1998-07-01), Ogawa et al.
patent: 5799085 (1998-08-01), Shona

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