Abstract: There is provided an electronic terminal device protection system as follows. When participating in a service, an authentication ID and a hardware address of the terminal device used for the service are registered in a communication center. The communication center makes the terminal device download the e-tally of the authentication ID and e-tally information of the hardware address accompanying the application software. When using the service, the e-tally of the hardware address and the tally of the authentication ID which have been acquired according to the e-tally information by the terminal device are sent to the communication center. The communication center correlates the authentication ID received with the authentication ID stored and correlates the tally of the hardware address with the tally of the hardware address stored, thereby authenticating the terminal device to be connected.

Abstract: An electronic information file is divided into a plurality of information elements, which are combined in different orders to generate two or more information blocks and to generate a primary distribution information file holding information on the method for dividing/rearranging the information elements. Like the electronic information file, the primary distribution information file is divided into key fragments and rearranged to generate key blocks and to generate a second distribution information file holding information on the method for dividing/rearranging the primary distribution information file. The information blocks, the key blocks and the secondary distribution information file are combined to generate and store or transmit two or more packages. When the electronic information is used, the primary distribution information file is restored on the basis of the secondary distribution file to restore the electronic information file on the basis of the primary distribution information file.

Abstract: There is provided an information operation management system having a high safety of the information stored. The system is a computer system performing user authentication and presenting electronic information attribution to the user. Electronic information on user authentication information and user attribution electronic information are respectively divided into division information, which are stored in separate files. When presentation of electronic information is requested, the electronic information on the user authentication information are collected from the files to restore the user authentication information, which is compared to the user authentication information inputted for performing authentication. When the authentication is successful, the user attribution electronic information are collected from the respective files so as to be restored and presented.

Abstract: Some of the pieces of divisional electronic information formed by dividing an electronic control program for an automobile are stored in an automobile operating key, the rest being stored in a car-mounted storage unit, and the pieces of divisional electronic information read in from the operating key and the pieces of divisional electronic information read out of the car-mounted storage unit are united by an electronic information integration restoration device to restore the electronic control program, whereby the automobile is driven. An automobile electronic control device of high safety which prevents the driving of the automobile unless a genuine key is used by utilizing a digital control system, a key mechanism using the same and methods thereof are provided.

Abstract: Biological individuality data for use in distinguishing the individuality of a user (8) are picked up, and a user authentication card (7) with at least part of the biological individuality data recorded thereon is issued. The contents of the record in the user authentication card (7) are read out by an authentication-card reader (41), and compared with biological individuality data input by the user through an identity acquisition device. Such personal authentication is directly executed at an authentication access terminal (4). The system also includes certification authorities (2), (3), each of which records part of the biological individuality data so that the certification authorities can additionally authenticate personal identification in response to inquiry from the authentication access terminal (4), thus improving the reliability.

Abstract: A security assurance technique for electronic information wherein an electronic information file 1 is divided into a plurality of information elements 2 and the divided information elements are selected and combined with their order changed to produce one or more information blocks 3, and division extraction data of the information elements is produced and the information blocks are formed and stored or transmitted, whereafter, when the electronic information is to be utilized, the information elements 4 included in the information blocks 3 are re-divided, re-arranged in the correct order and integrated based on the division extraction data to restore an original electronic information file 5, whereby, even if electronic information stored or being communicated is stolen, the value of the information is reduced to disable utilization of the information.

Abstract: Some of the pieces of divisional electronic information formed by dividing an electronic control program for an automobile are stored in an automobile operating key (20), the rest being stored in a car-mounted storage unit (12), and the pieces of divisional electronic information read in from the operating key (20) and the pieces of divisional electronic information read out of the car-mounted storage unit (12) are united by an electronic information integration restoration device (13) to restore the electronic control program, whereby the automobile is driven. An automobile electronic control device of high safety which prevents the driving of the automobile unless a genuine key is used by utilizing a digital control system according to this method: and a key mechanism using the same.

Abstract: A reference A divides the stored electronic information CA into more than one information element based on a dividing algorithm D (aD) applied with a dividing argument aD, selects information elements from the divided elements and generates a transmittal information block E based on a selecting algorithm S (aS) applied with a selecting argument aS, and sends the transmittal information block E accompanied with the arguments (aD, aS) to an inquirer B, and the inquirer divides the stored electronic information CB into more than one information element and selects a part of the divided elements based on the same dividing and selecting algorithms D (aD), S (aS) as used by the reference A applied with the arguments (aD, aS), replaces the selected elements with the information elements included in the transmittal information block E so as to form the third electronic information CI, and compares it with the stored electronic information CB to confirm identity between two of the electronic information CA and CB.