Hitachi, Ltd.

Kousuke Anzai

Hiroshi Yoshiura

Isao Echizen

Yutaka Kurosu

Hiroyuki Kimura

Shigeki Hirasawa

Akio Fukushima

Kunihiko Miyazaki

Masato Arai

Masataka Okayama

Yasuhiko Nagai

Jun'ichi Taguchi

Katsuyuki Okeya

Hiromi Ukai

Shinobu Eikawa

Kazunori Nakano

Hidaka Matsumoto

Shuichi Tago

A design/evaluation support toolis constructed from a table link use unitidentifying linkages between a threat-to-component correspondence table, a risk-value table, a component contribution rate table, and a risk-to-assurance level correspondence table, based on their respective duplicate items; and a component assurance level deriving unitderiving an assurance level of each of components that conforms to a risk value of a threat that a security function of each of the components counters by weighting the risk value of the threat by a component rate of contribution based on linkages of the tables.

Tool, method, and program for supporting system security design/evaluation

A contents control method for controlling a process on the receiving side which is applied to contents transmitted from the transmitting side to the receiving side, includes a step of adding, when a predetermined block of the transmitted contents is an area where control information for controlling the process substance on the receiving side which is applied to the contents is added, the control information to the block. The method also includes a step of receiving a process designation concerning the transmitted contents, and a step of applying, when user information stored in a receiving side apparatus which receives the transmitted contents, or information concerning the receiving side apparatus satisfies conditions corresponding to the received process designation in the control information added to the block of the contents, a process corresponding to the process designation to the received block.

Method and system for contents control

The present invention can detect watermark information from motion picture of various scanning methods and various picture sizes without causing increase of a memory capacity. A watermark information detection apparatusconverts encoded watermarked motion pictureinto standard motion picturehaving the smallest data size among the assumed kinds of motion picture. Further, the watermark information detection apparatusscales a standard coordination system that is utilized for specifying embedding locations of a watermark pattern. Then, with respect to each field of the standard motion picture, watermark information is detected from predetermined locations specified in the scaled standard coordinate system by the watermark pattern.

Method of detecting digital watermark information

A method for using digital contents is provided. In the method, a request is made to a provider apparatus for a certificate containing a first provider ID embedded therein by a certification authority, and the certificate is received from the provider apparatus. A decision is made by using the certificate as to whether or not the provider is authorized by the certification authority. A request is made to the provider apparatus for a digital content having a second provider ID embedded therein by a contents guarantee authority when the provider is authorized by the certification authority, and the digital content is received from the provider. The first provider ID is read from the certificate, the digital content is correlated with the second provider ID, and the digital content is stored in a storage medium. The second provider ID is detected from the digital content in response to a request to use the digital content. The first provider ID is compared with the second provider ID when the second provider ID is detected. The digital content is used when the first provider ID and the second provider ID match. The use of the digital content is restricted when the first provider ID and the second provider ID do no match.

Method and apparatus for using contents

A digital watermark information detection method for detecting information inserted as a digital watermark from contents has a step of converting the contents into a predetermined specified format and a step of trying to detect information from the converted contents. When a plurality of specified formats are defined in advance and detection of the information from the converted contents fails, the contents is converted into another specified format and the information detection is retried.

Watermark information detection method

A method of embedding digital watermark information b&#x2013;b(2&#x2266;n) in image data. The image data is divided into a plurality of areas S each consisting of M&#xd7;N (1&#x2266;M, N) pixels. A plurality of areas G each consisting of P&#xd7;Q (1&#x2266;P, Q) of the areas S are defined. Each of the areas S constituting each area G is allocated to some one of: areas T&#x2013;Tin which said digital watermark information b&#x2013;bis respectively embedded and areas H&#x2013;H(1&#x2266;m) in which information is not embedded. One or more areas T and one or more areas H are located in a predetermined arrangement in each area G. And, the plurality of areas G are located in a predetermined rule.

Method for embedding information and extracting the same

A digital watermark information is extracted from geometrically deformed image without using a calibrating digital watermark. Pixel data at positions predetermined in an X-Y coordinate used when embedding the watermark is extracted from image data in which the digital watermark has been embedded for given pixel data and compared with a reference value to determine whether the watermark has been embedded in the pixel data concerned or not. This processing is repeated until it is confirmed that the information is embedded in the pixel data concerned, while applying geometric deformation to the image data.

Method of extracting digital watermark information and method of judging bit value of digital watermark information

A method and apparatus for embedding information into a target element in which information is to be embedded and a storage medium. The method and apparatus include obtaining plural sets of data values of a plurality of elements, wherein each set of data values is obtained along one direction extending through the target element, determining a strength of embedding information into the target element based on the plural sets of data values obtained, and embedding information into the target element based on the strength determined. The storage medium stores a program which enables embedding information by execution by a computer.

Method of judging digital watermark information

A digital watermark information judging method is provided for detecting digital watermark information which is embedded in at least one element of digital data by altering at least one data value of the element. The method first estimates the data value of the element by using data values of at least two neighboring elements of data located near the element, then compares the estimated data value with an actual data value of the element to detect the amount of the alteration, and judges the presence and value of the digital watermark information based on the amount of the alteration.

According to a digital watermark information extracting method, pixel data located at predetermined positions on X-Y coordinate used when digital watermark information is embedded are extracted from image data, and the data value of the pixel data is compared with a reference value to judge whether the watermark information is embedded in the pixel data concerned. This processing is repetitively executed while a geometrical deformation is applied to the image data until it is confirmed that the information is embedded in the pixel data.

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Kawasaki, Japan

Kousuke Anzai