Abstract: A cryptographic management apparatus includes a storage unit which stores cryptographic key information containing a cryptographic key and cryptographic process condition information containing the cryptographic key information, a cryptographic process information input unit which receives an input of the object information and cryptographic key search request information, a cryptographic key information acquisition unit which acquires the cryptographic key information from the storage unit based on the search request information, a cryptographic module evaluation description information acquisition unit which acquires evaluation description information of the cryptographic module corresponding to the cryptographic key information, a cryptographic process ID creation unit which attaches an identifier of the cryptographic process condition information to the object information based on the cryptographic key information and the cryptographic module corresponding to the evaluation description information, and an

Abstract: A cryptographic client device acquires a cryptographic key from a storage device son the basis of the accepted demand information, acquires a cryptographic evaluation description file from the storage device, acquires a cryptographic module corresponding to this cryptographic evaluation description file, executes a cryptographic process on the subject data to be performed the cryptographic process, and issues the encrypted subject data.

Abstract: A cryptographic module management apparatus searches for cryptographic module meta-information based on the category information of a requested cryptographic module and, if associated cryptographic module category information is contained in this cryptographic module meta-information, searches for the cryptographic module meta-information of an associated cryptographic module, to generate composite type cryptographic module evaluation information based on this cryptographic module meta-information, select a cryptographic module based on this composite type cryptographic module evaluation information, and read this cryptographic module from a cryptographic module storage portion and output such composite type cryptographic module evaluation information.

Abstract: In a cryptographic module distribution system, a cryptographic management server apparatus encrypts a cryptographic module using a key shared by a cryptographic apparatus, and transmits the encrypted cryptographic module to a client apparatus. The client apparatus transmits the encrypted cryptographic module to a cryptographic apparatus. The cryptographic apparatus decrypts the encrypted cryptographic module using the key shared by the cryptographic management server apparatus, and transmits the decrypted cryptographic module to the client apparatus. The client apparatus stores the received cryptographic module.

Abstract: A cryptographic module selecting device includes a cryptographic module evaluation information storage device configured to store identification information of a cryptographic module and cryptographic module evaluation information describing a function and/or performance of the cryptographic module in relation to each other, a condition information acquiring device configured to acquire condition information for specifying the condition of the cryptographic module to be selected, an extracting device configured to extract cryptographic module evaluation information conforming to the acquired condition information, from the stored cryptographic module evaluation information of the cryptographic module, and an output device configured to read out the identification information of the cryptographic module corresponding to the cryptographic module evaluation information selected by the extracting device from the cryptographic module evaluation information storage device and output the read identification informat

Abstract: A cryptographic module selecting device includes a cryptographic module evaluation information storage device configured to store identification information of a cryptographic module and cryptographic module evaluation information describing a function and/or performance of the cryptographic module in relation to each other, a condition information acquiring device configured to acquire condition information for specifying the condition of the cryptographic module to be selected, an extracting device configured to extract cryptographic module evaluation information conforming to the acquired condition information, from the stored cryptographic module evaluation information of the cryptographic module, and an output device configured to read out the identification information of the cryptographic module corresponding to the cryptographic module evaluation information selected by the extracting device from the cryptographic module evaluation information storage device and output the read identification informat

Abstract: In a cryptographic module distribution system, a cryptographic management server apparatus encrypts a cryptographic module using a key shared by a cryptographic apparatus, and transmits the encrypted cryptographic module to a client apparatus. The client apparatus transmits the encrypted cryptographic module to a cryptographic apparatus. The cryptographic apparatus decrypts the encrypted cryptographic module using the key shared by the cryptographic management server apparatus, and transmits the decrypted cryptographic module to the client apparatus. The client apparatus stores the received cryptographic module.

Abstract: A cryptographic management apparatus includes a storage unit which stores cryptographic key information containing a cryptographic key and cryptographic process condition information containing the cryptographic key information, a cryptographic process information input unit which receives an input of the object information and cryptographic key search request information, a cryptographic key information acquisition unit which acquires the cryptographic key information from the storage unit based on the search request information, a cryptographic module evaluation description information acquisition unit which acquires evaluation description information of the cryptographic module corresponding to the cryptographic key information, a cryptographic process ID creation unit which attaches an identifier of the cryptographic process condition information to the object information based on the cryptographic key information and the cryptographic module corresponding to the evaluation description information, and an

Abstract: A cryptographic client device acquires a cryptographic key from a storage device son the basis of the accepted demand information, acquires a cryptographic evaluation description file from the storage device, acquires a cryptographic module corresponding to this cryptographic evaluation description file, executes a cryptographic process on the subject data to be performed the cryptographic process, and issues the encrypted subject data.

Abstract: A cryptographic module management apparatus searches for cryptographic module meta-information based on the category information of a requested cryptographic module and, if associated cryptographic module category information is contained in this cryptographic module meta-information, searches for the cryptographic module meta-information of an associated cryptographic module, to generate composite type cryptographic module evaluation information based on this cryptographic module meta-information, select a cryptographic module based on this composite type cryptographic module evaluation information, and read this cryptographic module from a cryptographic module storage portion and output such composite type cryptographic module evaluation information.

Abstract: In a narrow magnetoresistive head having a magnetic domain control film comprising a single layer of magnetic film or magnetic films antiferromagnetically coupled by means of a nonmagnetic member, it has been found that the magnetic domain can be controlled with a smaller magnetization film thickness product than anticipated so far and the range is defined relative to the geometrical track width in the present invention. By defining the magnetization film thickness product of the magnetic domain control film within a prescribed range of the invention, a magnetic head having higher output than usual and having stable output with no hysteresis in the transfer curve and with no output fluctuation can be attained.

Abstract: A magnetic recording head includes an upper shield layer, a lower shield layer, a magnetoresistive film interposed between the upper shield layer and the lower shield layer, and a pair of leads electrically coupled to the magnetoresistive film, in which a pair of side shield layers constituted by portions of the upper shield layer is formed on both sides of the magnetoresistive film, and a spacing between each side shield layer and the magnetoresistive film is formed to be narrower than twice of a spacing between the upper shield layer and the lower shield layer, thereby a side reading amount can be made smaller than a conventional side reading value determined from the spacing between the upper and lower shield layers and a magnetic spacing between the head and a medium.

Abstract: In a giant magnetoresistive head, a magnetic read width is reduced and a read output is increased. The giant magnetoresistive head has a magnetoresistive film having a pinned layer, a non-magnetic layer, and a free layer, a pair of terminals for applying a current to the magnetoresistive film, and bias applying means for applying a bias magnetic field for magnetic domain control to the free layer. The free layer has a sensing region and a pair of out-of-sensing-region regions on both ends of the sensing region. The magnetization direction of one of the out-of-sensing-region regions and the magnetization direction of the other out-of-sensing-region region have different components in a direction of element height of head. The magnetization of the one out-of-sensing-region region and the magnetization of the other out-of-sensing-region region are nearly symmetrical relative to the sensing region interposed therebetween.

Abstract: In a side shield structure employed to narrow the effective track, a noise caused by the side shield structure can be reduced. In one embodiment, the side shield is inclined with respect to the film plane to suppress the generation of a magnetic pole in the end portion of the side shield. To this end, the side face of a device is inclined at a desired angle. Further, a reproduction device is formed at two or more angles ?1 and ?2 to improve the track width accuracy.

Abstract: A magnetic recording head includes an upper shield layer, a lower shield layer, a magnetoresistive film interposed between the upper shield layer and the lower shield layer, and a pair of leads electrically coupled to the magnetoresistive film, in which a pair of side shield layers constituted by portions of the upper shield layer is formed on both sides of the magnetoresistive film, and a spacing between each side shield layer and the magnetoresistive film is formed to be narrower than twice of a spacing between the upper shield layer and the lower shield layer, thereby a side reading amount can be made smaller than a conventional side reading value determined from the spacing between the upper and lower shield layers and a magnetic spacing between the head and a medium.

Abstract: A magnetic recording head includes an upper shield layer, a lower shield layer, a magnetoresistive film interposed between the upper shield layer and the lower shield layer, and a pair of leads electrically coupled to the magnetoresistive film, in which a pair of side shield layers constituted by portions of the upper shield layer is formed on both sides of the magnetoresistive film, and a spacing between each side shield layer and the magnetoresistive film is formed to be narrower than twice of a spacing between the upper shield layer and the lower shield layer, thereby a side reading amount can be made smaller than a conventional side reading value determined from the spacing between the upper and lower shield layers and a magnetic spacing between the head and a medium.

Abstract: In a composite magnetic head comprising a magnetoresistive read head including a magnetic thin film having a magnetoresistive effect and soft magnetic members interposing the soft magnetic film between them through a non-magnetic insulation layer, an induction type write head including poles formed in a moving direction of a medium and a conductor crossing the poles, and disposed in the proximity of the magnetoresistive head, and a substrate supporting these heads, the present invention discloses a composite magnetic head characterized in that part of a floating surface inclusive of the magnetic head constituent members has recesses and the read/write operations to and from the medium are effected by the portion interposed by these recesses.

Abstract: In a narrow magnetoresistive head having a magnetic domain control film comprising a single layer of magnetic film or magnetic films antiferromagnetically coupled by means of a nonmagnetic member, it has been found that the magnetic domain can be controlled with a smaller magnetization film thickness product than anticipated so far and the range is defined relative to the geometrical track width in the present invention. By defining the magnetization film thickness product of the magnetic domain control film within a prescribed range of the invention, a magnetic head having higher output than usual and having stable output with no hysteresis in the transfer curve and with no output fluctuation can be attained.

Abstract: In a giant magnetoresistive head, a magnetic read width is reduced and a read output is increased. The giant magnetoresistive head has a magnetoresistive film having a pinned layer, a non-magnetic layer, and a free layer, a pair of terminals for applying a current to the magnetoresistive film, and bias applying means for applying a bias magnetic field for magnetic domain control to the free layer. The free layer has a sensing region and a pair of out-of-sensing-region regions on both ends of the sensing region. The magnetization direction of one of the out-of-sensing-region regions and the magnetization direction of the other out-of-sensing-region region have different components in a direction of element height of head. The magnetization of the one out-of-sensing-region region and the magnetization of the other out-of-sensing-region region are nearly symmetrical relative to the sensing region interposed therebetween.

Abstract: A magnetic recording head includes an upper shield layer, a lower shield layer, a magnetoresistive film interposed between the upper shield layer and the lower shield layer, and a pair of leads electrically coupled to the magnetoresistive film, in which a pair of side shield layers constituted by portions of the upper shield layer is formed on both sides of the magnetoresistive film, and a spacing between each side shield layer and the magnetoresistive film is formed to be narrower than twice of a spacing between the upper shield layer and the lower shield layer, thereby a side reading amount can be made smaller than a conventional side reading value determined from the spacing between the upper and lower shield layers and a magnetic spacing between the head and a medium.