Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Junichi Yasui

Shinji Inoue

Takuji Maeda

Makoto Fujiwara

Takayuki Ito

Yusuke Nemoto

Yasushi Yamada

Tsukasa Yoshiura

Toshihiko Maruoka

A secure LSI deviceincludes an encryption sectionfor encrypting a program, and an external I/Ffor inputting/outputting a program or data from/to an external memory. In the encryption section, the operation of a private key arithmetic processing sectionis prohibited with respect to a sequence whose execution is determined by a key-generation/update sequencerto be impermissible. In the external I/F, a program processing sectionand a data processing sectionare structured independently from each other.

Semiconductor device including encryption section, semiconductor device including external interface, and content reproduction method

An development environment of a high security level is provided for a key-installed system. Development of a program for a system having an LSI device which includes a secure memory is performed by providing another LSI device having the same structure and setting the provided LSI device to a development mode which is different from a product operation mode. Alternatively, the provided LSI device is set to an administrator mode to perform development and encryption of a key-generation program. The LSI device is set to a key-generation mode to execute the encrypted key-generation program, thereby generating various keys.

Program development method, program development supporting system, and program installation method

A network hardware device of the invention includes a reception section receiving data from a network, and outputting a reception completion signal, a timer section measuring a preset time, and a delay section generating an interrupt signal so as to notify a host CPU of completion of the reception. When the timer section does not measure a time, the delay section generates an interrupt signal upon reception of the reception completion signal. On the other hand, when the timer section measures a time, upon reception of the reception completion signal, the delay section generates an interrupt signal after the timer section measures a preset time.

Network hardware device

A system including a secure LSIestablishes a communication path to/from a server(UD), and receives a common key-encrypted program generated by encryption with a common key and transmitted from the server(UDand UD). The received common key-encrypted program is decrypted to generate a raw program, and the raw program is re-encrypted with an inherent key to newly generate an inherent key-encrypted program, which is stored in an external memory.

Program update method and server

A secure LSI deviceincludes an encryption sectionfor encrypting a program, and an external I/Ffor inputting/outputting a program or data from/to an external memoryIn the encryption sectionthe operation of a private key arithmetic processing sectionis prohibited with respect to a sequence whose execution is determined by a key-generation/update sequencerto be impermissible. In the external I/Fa program processing sectionand a data processing sectionare structured independently from each other.

Growing community of inventors

Osaka, Japan

Junichi Yasui