Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Kenichi Hiramatsu

Akihiro Kasahara

Hideo Shimizu

Toru Kambayashi

Masao Suga

Takehisa Kato

Shingo Miyazaki

Akio Okazaki

Tsuyoshi Ishida

Yasuhiko Suzuki

Sunao Wada

Naoki Endo

Shuji Kizu

Daigo Yoshii

Akira Toshima

Junji Miura

Koichi Noguchi

Koji Mikami

Each embodiment of this invention implements step-by-step and empirical authentication of devices upon digital authentication among a plurality of devices. Each of a plurality of authentication devices of each embodiment can unidirectionally generate a hash value of a low experience rank from a hash value of a high experience rank, and receives a set of high experience rank and hash value in accordance with an experience. Upon receiving a certification request of the experience rank from another authentication device, the authentication device transmits a corresponding hash value to the authentication device as a request source. Upon sending a certification request of an experience rank to another authentication device, the authentication device verifies a hash value obtained from the other authentication device on the basis of a self hash value. In this way, the authentication devices authenticate each other's experience ranks.

System of authentication, apparatus, program and method

A pressure sensor for inputting finger characteristic data and an authenticity sensor for detecting whether a finger is authentic are arranged on the surface of an IC card. A finger can be placed on the pressure sensor and the authenticity sensor at the same time. Finger characteristic data is input by the pressure sensor. A controller calculates a sum signal from the input finger characteristic data, and collates the calculated sum signal with a reference sum signal of an owner of the card stored in a dictionary memory. An authenticity detecting circuit inputs data from the authenticity sensor, and detects whether a finger is authentic. If the finger is authentic and if a coincidence is determined between the calculated and reference sum signals, the use of the IC card is permitted.

IC card with individual authentication function

Analog switches are connected between corresponding photodiodes and a common output line. The analog switches are sequentially scanned in response to scanning pulses. During the ON period of each scanning pulse, the corresponding analog switch is turned on twice. A first circuit produces a first signal, including an image signal component and a noise signal component, when the analog switch is turned on for the first time, and produces a second signal including only the noise signal component, when the analog switch is turned on for the second time. A second circuit produces the signal derived from the difference between the first and second signals, i.e., the image signal.

Photoelectric conversion apparatus

Growing community of inventors

Kawasaki, Japan

Kenichi Hiramatsu