Kabushiki Kaisha Toshiba

Toshiba Electronic Devices & Storage Corporation

Tatsuaki Iwata

Noboru Yamaguchi

Tomoya Kodama

Atsushi Matsumura

Yasuto Aramaki

Taichiro Yamanaka

Hiromi Sakata

Daisuke Mito

Mika Fujishiro

Susumu Yasuda

An information processing device of one embodiment includes a first memory being volatile, a second memory being non-rewritable and nonvolatile, and a processor. A first program, a second program, and a digital signature for the second program are loaded into the first memory. A third program and a public key are stored in the second memory. Upon satisfaction of a certain condition during execution of the first program, the processor verifies the second program on the basis of the digital signature and the public key, in accordance with the third program. After finding a result of the verification as a pass, the processor analyzes the first program in accordance with the second program. The processor refrains from analyzing the first program after finding the result of the verification as a fail.

Information processing device controlling analysis of a program being executed based on a result of verification of an analysis program

According to one embodiment, a server device includes a memory and a processor. The memory stores verification information. The processor accepts a request to transmit a certificate number, generates information in which identification information of one of storage devices from which data is to be erased, a public key, a secret key, and the certificate number are associated with one another, transmits the certificate number, performs verification using an authenticator transmitted by the one storage device and verification information, generates, based on a result of the verification, an erasure certificate that includes the identification information and the certificate number and is signed using the secret key, and transmits the erasure certificate.

System, server device, and storage device

The image coding apparatus is provided to realize image coding with little calculation quantity and through rate distortion optimization thereby maintaining a favorable image quality. The image coding apparatus includes a processing unit that conducts frequency transform and quantization on a block in a predetermined manner for a plurality of coding modes, each mode having a different coding process, a cost calculating unit that calculates a predictive coded quantity and coding distortion in a coding mode using a result of the quantization conducted by the processing unit and a residue to obtain a cost regarding the coding mode, a minimum coding cost selecting unit that selects a minimum coding cost among the coding costs calculated for respective coding modes, and a coding unit that conducts coding on the blocks in a coding mode associated with the minimum coding cost selected by the minimum coding cost selecting unit.

Image coding apparatus, image coding method and image coding program

Image coding apparatus including a coded quantity prediction expression retaining unit

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Kanagawa, Japan

Tatsuaki Iwata