Fujitsu Corporation

Mikako Fujii

Toshihiro Kodaka

Mitsuru Nakajima

Hitoshi Monma

Yoshiaki Imajima

Takayoshi Handa

An authentication system, program and method authenticates users who are parties to a transaction by supplying a first user with a matching key for a prospective transaction, receiving by a second user the matching key supplied to the first user; and matching the key supplied from the first user to the second user against the key supplied to the first user, after the second user has received the key from the first user.

Authentication method, authentication system, payment system, user apparatus and recording medium containing program for conducting authentication

The present invention relates to a system wherein each of a reservation server that makes reservations of sales and purchases, a portable terminal owned by a user who makes a reservation, and a shop terminal provided in stores where goods are sold, and a service or entertainment is provided, is connected to a communication network whereby the user makes a reservation for sales or purchase by accessing the reservation server, the reservation server encrypts contents of the sales/purchase reservation and transmits the encrypted reservation information to the aforementioned portable terminal, the user presents the transmitted encrypted reservation information to the shop terminal, visiting the shop terminal, and the shop terminal accesses the reservation server to confirm whether the presented encrypted reservation information is legitimate or not and admits the presenter of the encrypted reservation information if the reservation information is legitimate.

Reservation method, reservation authentication method, reservation confirmation method, reservation servers, shop terminals, portable terminals and memory media

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Kawasaki, Japan

Mikako Fujii