Hitachi Software Engineering Company, Ltd.

Natsuki Ishida

The security of an authentication system using a one-time password is increased, a shift from an authentication system using a fixed password is simplified, and a range of use is increased. An authentication system wherein a one-time password is synchronized with time, or an authentication system wherein a one-time password is synchronized with the number of online service authentication requests, is provided. When a one-time password clientdownloads a one-time password for online service authentication from a one-time password server, current time information or a current value of the number of online service authentication requests is made to coincide between the client and server, and an online service authentication request is authenticated as long as the downloaded one-time password for online service authentication is valid. The one-time password may also be synchronized with service usage details contained in the online service authentication request.

Growing community of inventors

Tokyo, Japan

Natsuki Ishida