Patent Number: 6,253,322

Title: Electronic certification authentication method and system

Abstract: Certification and authentication services (electronic information signing and archiving services) are given when electronic commerce is carried out in an open network such as Internet. A system has a service supplying unit and service receiving units which are connected to one another through a communication network. In the system, the service supplying unit transmits contract information including a content of a contract to the service receiving units of the service receivers. Each of the service receiving units having received the contract information prepares one party-signed contract information in which the contract information is digitally signed by the service receiver and transmits the one party-signed contract information to the service supplying unit. The service supplying unit receives the one party-signed contract information transmitted from each of the service receiving units, synthesizes a plurality of received copies of one party-signed contract information into a single document, prepares contract information signed by the service supplier in which the document is digitally signed by the service supplier, and archives the prepared service supplier-signed contract information and transmits such contract information to each of the service receiving units.

Inventors: Susaki; Seiichi (Yokohama, JP), Mizuno; Yasuhiko (Sakura, JP), Takahashi; Miwa (Kawasaki, JP), Mitsunaga; Satoshi (Kawasaki, JP), Moriyama; Shoji (Tokyo, JP)

Assignee: Hitachi, Ltd.

International Classification: G06F 21/00 (20060101); H04L 9/32 (20060101); H04L 009/00 ()

Expiration Date: 06/26/2018