Fujitsu Corporation

Akio Munakata

Ryota Akiyama

Yuzuru Koga

Masayuki Ishizaki

Makoto Yoshioka

Shoichi Sano

Takeshi Kitahara

Hiroshi Oki

Takeshi Okazaki

Susumu Abe

Osamu Kawai

Toshihisa Nakamura

A terminal management device manages the sharing by at the least one business entity of costs related to distributed terminal devices. In a case that a new business entity, which uses the terminal devices and provides services after the terminal devices have been distributed, the terminal management device computes and totals the differences of shared costs of each business entity, which will change in accordance with the addition thereof. Thus, by managing the changes of a plurality of business entities bearing the costs related to terminal devices, changes in the shares of the costs thereof can be adjusted easily even in a case that business entities using the terminal devices thereof and providing services change after the terminal devices have been distributed to subscribers. Therefore, the present invention facilitates the participation of a new service business entity in the provision of services using terminal devices subsequent to the terminal devices being distributed.

Management device, network apparatus, and management method

A random-number generator generates first and second title keys on the basis of random numbers. A first DES encryption circuit for the title encrypts input data with the first title key. Initial values of this item of input data are a data identifier (ID) and program clock reference (PCR) that are extracted from a packet header. After completing the encryption of the initial values, a result of an encryption by a second DES encryption circuit for title serves as the input data for the first DES encryption circuit for title. The second DES encryption circuit for title encrypts a value of result of the encryption by the first DES encryption circuit for title with the second title key. An exclusive OR circuit outputs an exclusive OR of the data stored in the packet and a value of result of the encryption by the second DES encryption circuit for title. This exclusive OR turns out encrypted data.

Encryption processing system

A key management unit of a service provider system generates an individual key corresponding to a portable module connected to a service client making an access request and informs an authenticating unit of this individual key. The individual key is stored beforehand also in the portable module. A random-number generator generates a random number, transmits this random number to the portable module and informs the authenticating unit of it. The portable module encrypts the random number with the individual key and sends it back to the service provider system. An encrypting portion of the authenticating unit encrypts the random number with the individual key. A comparator of the authenticating unit compares data encrypted by the encrypting portion with encrypted data transmitted from the portable module and, if the two items of data are coincident with each other, confirms an access request from the portable module.

System for and method of authenticating a client

An image data conversion method for converting the image data signal to the runlength signal through the process for reading once or several times a runlength code from a runlength conversion table for a given image data signal and a process for adding the pertinent runlength code when the same type of runlength code appears continuously. A character code/character pattern conversion apparatus which uses said image data conversion method, and provides, moreover, a multiplication device for multiplying character enlarging coefficient and the runlength code and a character interval inserting means which adds a character interval width code to the enlarged runlength code and outputs the input character code after converting it to the enlarged character pattern along with the interval code.

Image data conversion method and character code/character pattern

Growing community of inventors

Kawasaki, Japan

Akio Munakata