Kabushiki Kaisha Toshiba

Ikuko Osajima

Nobuyuki Ikeda

Akira Suzuki

Hirotaka Toya

Katsumasa Jin

Shinji Ogishima

A non-transitory, computer-readable medium stores a software component that includes a fraud examination module. The fraud examination module restricts a use of the software component if the use is unauthorized. The fraud examination module includes fraud determination data which predefines use conditions. The fraud examination modules also includes a determination module that obtains use data and determines the use of the software component to be unauthorized if the obtained use data does not match the use conditions. The use conditions predefined by the fraud determination data include a device identification number which is unique to a device on which an installation of the software component is permitted. The determination module obtains, through an operating system, a device identification number which is unique to a device on which the software component is actually installed as the use data.

Software component, software component management method, and software component management system

A network communication system has terminal devices belonging to a group, the terminal devices generating, if there is a leaving terminal device leaving from the group, an updated group encryption key corresponding to a new group encryption key, from a deletion key corresponding to the leaving terminal device and a group encryption key, and, after the leaving terminal device leaves the group, communicating by using the updated group encryption key; and a group management server generating the updated group encryption key corresponding to the new group encryption key from the deletion key corresponding to the leaving terminal device and the group encryption key, and, after the leaving terminal device leaves the group, communicating by using the updated group encryption key.

Growing community of inventors

Yokohama, Japan

Ikuko Osajima