Fujitsu Corporation

Mitsubishi Corporation

Ntt Communications Corporation

Sumitomo Corporation

Information-technology Promotion Agency

Yoshihide Tanaka

Toshihiko Kaji

Hirofumi Fujiwara

Seinosuke Kashima

Toshiyuki Iida

Keiko Shiraishi

Munehiko Ishimi

Kazuhiko Sekine

Akimitsu Yomoda

A user registration processor unit registers the user registration information to the database, which includes the public key certification acquired from the certification authority that has jurisdiction over each party by the request from the transaction party including seller, buyer, and transportation company. A transfer registration processor unit changes the access right holder and the cargo owner of the shipment information registered to the database at the start of transaction in compliance with the request for request for changing registration of the party with the digital signature and public key certification attached. A verification processor unit achieves the transfer registration with legal binding power by verifying that the digital signature attached to the request for request for changing registration has been prepared by the private key which makes a pair with the public key certificate registered to the database and receiving the approval of the other party.

Electronic transaction server, client for seller, client for buyer and electronic transaction method

Growing community of inventors

Tokyo, Japan

Yoshihide Tanaka