Hitachi, Ltd.

Calsonic Kansei Corporation

Shinji Itoh

Kunihiko Miyazaki

Kouichi Tanimoto

Narihiro Omoto

Hiroshi Yoshiura

Yoshiharu Bessho

Kazuo Takaragi

Toshiaki Arai

Yoshinori Honda

Isao Yamaguchi

Masato Arai

Isao Echizen

Takeshi Matsuki

Naoto Sato

Eiji Yamatani

Hironobu Kuruma

Hisashi Toyoshima

Tomoyuki Myojin

Yuichiroh Nakagawa

Nozomi Itoh

Hideto Ogawa

Shigeru Oyamada

Katsuko Nishioka

Hiroyasu Nunokami

Yasuaki Kudo

Keiji Sakamoto

Software test equipment including a data conversion unit receives test input data to convert the test input data into software input data to be provided to software and model input data, a software execution unit receives the software input data, executes the test target software based on the software input data, and outputs an execution result, a model execution unit receives a reference model for the software to generate a model allowable output value range of the execution result obtained by executing the software, based on the model input data and the reference model, a difference analysis unit generates difference information based on the execution result output by the software execution unit and the model allowable output value range generated by the model execution unit, and an evaluation unit receives evaluation criteria and evaluates the behavior of the software based on the difference information and the evaluation criteria.

Software test equipment and software testing method

A signature log storing apparatus includes a signature log list and a certificate list, and registers, in the signature log list, a part of signature information in generated hysteresis signature as a signature record and a part of a user certificate in the certificate list. The signature log storing apparatus further includes a trust point list and validates a signature records registered in the signature log list and registers identification information for identifying a latest signature record out of the validate signature record, evidence information for validating validity of the user certificate for a validated signature record, and a hash value of information derived by connecting the evidence information and the hash value as needed or before the user certificate expires.

Signature log storing apparatus

A method of managing digital signature includes the steps of preparing a signature log file storing signature log entry information, generating a new digital signature for a transmission message by reflecting, in the new digital signature, signature log entry information registered to the signature log file in the past; generating signature log entry information associated with the new digital signature and registering the signature log entry information to the signature log file; and preparing a user search file in addition to the signature log file; registering, to the user search file, user identifier information indicating a transmission destination of the transmitted digital signature and a transmission source of the received digital signature, with a correspondence established between the information, the user identifier information, and each signature log entry information in the signature log file.

Method of managing digital signature, apparatus for processing digital signature, and a computer readable medium for recording program of managing digital signature

The invention provides a method for verification having a structure that reflects reliability of a signature history properly for a hysteresis signature used for verification based on the signature history, and provides a method for arbitration and an arbitrator apparatus that solve a dispute on correctness of a signature based on the method for verification. Furthermore, the invention provides a method for managing history that mitigates the signature history management burden on a signer. Reliability is set on a signature forming record that is a component of a signature history, reliability of the signature history is calculated based on the set reliability, and the calculated reliability is output as reliability of a verification result. The invention provides a method for verification having a structure that reflects the reliability of a signature history properly and a method for arbitration and an arbitrator apparatus that solve a dispute on correctness of a signature. Furthermore, providing a signature history storage service apparatus mitigates the signature history storage burden on a signer.

Method for verifying a digital signature

A publication system effective and secure to the publication agency and a user is provided for the publication agency, and a signature verifying function using the published signature log entries is provided for the user. The publication agency publishes a signature log entry received from the users on the Web, and acquires a time-stamp at the time of the publication, and transmits the time-stamp together with a publication notice back to the user. The publication agency also has the signature log, and either discloses part of the log at regular intervals in a newspaper or the like, or produces publication-purpose data based on the signature log entry received from each user, and publishes the data in the newspaper. The publication agency, after the newspaper publication, transmits the signature log of the publication agency to the user.

Method and apparatus for publishing signature log entry

Techniques of improving the safety of an information processing system at low cost are provided, the information processing system having an OS provided with an access control function based upon discretionary access control for preventing illegal accesses to files. A method and apparatus for providing the information processing system with functions and areas usable only by a specific user different from a system administrator. The areas are provided with an access control function in order to prevent the access control function from being tampered.

Trusted computer system

A reliably safe storage system is provided which makes provable the status of a file stored in a storage server at a time specified by a user and creates evidence information that will be effective in future. In response to a file status fixing request from the user over a network, a storage server generates file fixing guarantee data, including data publicized by a publication server, and saves the generated data with the file associated with the generated data.

File storage system and a NAS server

A network system capable of preventing the leakage of a confidential file by an inadvertent act of a transmitting party and capable of meeting the requirement for an arbitrary file format is disclosed. A label indicating a security level ('confidential' or 'unclassified') is attached to the file in a client terminal, which transmits the labeled file outside. A transmission management program on a gateway server checks the label of the file, and in the case where the security level is &#x201c;unclassified&#x201d;, transmits the file to an external network. Also, a label management program manages the labeled file in the client terminal.

Network system enabling transmission control

Slits to be used for insertion of an FFC are formed in the root section of each of guide ribs of a male connector housing. A retainer provided integrally with the male connector housing is engaged with a rear-end opening section of the male connector housing. The FFC is sandwiched between a projecting section of the male connector housing and a recessed section of the male connector housing, in a folded manner.

Connector for connecting FFC

Growing community of inventors

Yokohama, Japan

Shinji Itoh