| 摘要 |
PURPOSE:To attain ciphered data communication with high confidentiality and simple processing by using a resource key so as to generate a public key, generating further a common DES cryptographic key based on the exchanged public keys and each resource key and using the DES cryptographic key with high confidentiality so as to cipher or decipher the data. CONSTITUTION:The system consists of a mobile body communication equipment 1 corresponding to a portable terminal equipment of a teleterminal system or the like, a packet communication controller 2 corresponding to a radio base station and a packet exchange, and a subscriber equipment 3 corresponding to a host computer. Then the mobile body communication equipment 1 and the subscriber equipment 3 after the connection of the communication line transmit/receive the public key generated based respectively on the resource key as the communication data, generate the common DES cryptographic key based on the received public key, the data subject to cipher processing based on the DES cryptographic key is sent in the data communication between the mobile body communication equipment 1 and the subscriber equipment 3 and the received ciphered data is deciphered by using the DES cryptographic key. Thus, the ciphered data communication with high confidentiality and simple processing is attained. |
