Fujitsu Corporation

Hiroyuki Tominaga

Yoshiharu Sato

Norimichi Hiroshige

A security system ensures the security of electronic information shared among a plurality of companies by restricting the accessible range of the electronic information depending on the managing level of a user who accesses the electronic information. When a requester makes a request for sharing electronic information, the system acquires the managing level of the requester from user data, finds a tenant to which the requester belongs from tenant data, and provides the requester with a list of users who belong to the tenant to which the requester belongs.

Security system for electronic information sharing

A file sharing system implemented on a system having a server system and a plurality of client systems connected to the server system via a network. The file sharing system includes a WWW server provided in the server system, a first storage unit provided in the server system and storing files, a WWW-server-function extension unit provided in the server system and operating in association with the WWW server to control the files based on file identifiers. The file sharing system further includes a WWW browser provided in a client system which is one of the client systems and receiving one of the files and a corresponding file identifier from the server device, a second storage unit provided in the client system and storing the one of the files, a WWW-browser-function extension unit provided in the client system and operating in association with the WWW browser to activate an application to update the one of the files and to send an updated file and the corresponding file identifier to the server system.

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Fukuoka, Japan

Hiroyuki Tominaga