Patent ID: 7542570
Filing Date: 2009-06-02
Classification: H04L

Abstract:
1. An information encrypting transmission and reception system in an information transmission and reception network composed of a plurality of senders and receivers having computers being connected and communicating each other via a web network and a data center having a server computer for receiving electronic key data of bit data formed by the senders and receivers and personal data such as address corresponding to each electronic key data to register the server computer and providing the data only to a person who is certified his or her validity in use of the registered data as certification data, comprising: providing a sender server computer for transmitting and receiving data of the senders and a receiver server computer for transmitting and receiving data of the receivers that are connected to the web network; firstly encrypting bit data of original information such as plaintext to be transmitted from one of the senders to one of the receivers by performing an exclusive OR operation in use of bit data of electronic key of the sender and transmitting the firstly encrypted bit data attached with personal data of the receiver to the sender server computer; by the sender server computer, receiving bit data of the electronic key of the receiver by submitting personal data of the receiver to the data center, secondly encrypting the firstly encrypted bit data by performing exclusive OR operation in use of received bit data of the electronic key of the receiver, and transmitting the secondly encrypted bit data attached with personal data of the sender and the receiver to the receiver server computer; by the receiver server computer, receiving the secondly encrypted bit data, receiving bit data of the electronic key of the sender by submitting personal data of the sender to the data center, thirdly encrypting the secondly encrypted bit data by performing exclusive OR operation in use of received bit data of the electronic key of the sender, and informing the receiver about the reception of the thirdly encrypted bit data or transmitting the thirdly encrypted bit data to the receiver; and by the receiver, obtaining the original information such as plaintext from the sender by performing an exclusive OR operation on the thirdly encrypted bit data in use of the bit data of the electronic key of the receiver.