| 摘要 |
PURPOSE: To surely protect the privacy of an ordering person concerning the mail order system for ordering and purchasing merchandise through a communication network. CONSTITUTION: An ordering person (i) doubly ciphers the merchandise code of order merchandise by using two cryptographic keys and those two cryptographic keys are respectively ciphered for a relay section (b) and a merchandise section (c). Then, the doubly ciphered merchandise code is transmitted to a reception section (a) together with the two ciphered cryptographic keys and the identifier of the ordering person. The reception section (a) transmits the received ciphered order contents to the relay section (b) together with a reference number Ref 1. Among the received ciphered order contents, the cryptographic key ciphered for the relay section is deciphered and the doubly ciphered merchandise code is partially deciphered by the delay section (b). Then, the partially deciphered merchandise code is transmitted to the merchandise section (c) together with the cryptographic key ciphered for the merchandise section and a reference number Ref 2. The merchandise section (c) deciphers the cryptographic key ciphered for the merchandise section, further deciphers the partially deciphered merchandise code and recognizes the name of ordered merchandise. |
