Abstract: According to the invention, techniques for authenticating that a digitally signed document is genuine. Specific embodiments according to the present invention can determine whether a digital signature was generated by a digital signature generator, or if the digital signature was generated by a third party posing as the digital signature generator. Specific embodiments can provide independent verification of digital signer identity based upon prior signed messages, time/date stamps, and the like. Techniques according to the present invention can be embodied in methods, apparatus, computer software and systems.

Abstract: An electronic document authenticity assurance technique and an information disclosure system both of which can compatibly realize the assurance of the authenticity of disclosure documents and the deletion of information inappropriate for disclosure. An electronic document is divided into constituent elements and an electronic signature is affixed to an arbitrary subset of a set including all the constituent elements. Otherwise, an electronic signature is affixed to data obtained by binding each of the constituent elements to information specifying the relationship between a respective one of the constituent elements and the structure of the electronic document. Otherwise, the hash values of the respective constituent elements are calculated and an electronic signature is affixed to data obtained by binding the calculated hash values together.

Abstract: An electronic document authenticity assurance technique and an information disclosure system both of which can compatibly realize the assurance of the authenticity of disclosure documents and the deletion of information inappropriate for disclosure. An electronic document is divided into constituent elements and an electronic signature is affixed to an arbitrary subset of a set including all the constituent elements. Otherwise, an electronic signature is affixed to data obtained by binding each of the constituent elements to information specifying the relationship between a respective one of the constituent elements and the structure of the electronic document. Otherwise, the hash values of the respective constituent elements are calculated and an electronic signature is affixed to data obtained by binding the calculated hash values together.

Abstract: According to the invention, techniques for authenticating that a digitally signed document is genuine. Specific embodiments according to the present invention can determine whether a digital signature was generated by a digital signature generator, or if the digital signature was generated by a third party posing as the digital signature generator. Specific embodiments can provide independent verification of digital signer identity based upon prior signed messages, time/date stamps, and the like. Techniques according to the present invention can be embodied in methods, apparatus, computer software and systems.

Abstract: According to the invention, techniques for authenticating that a digitally signed document is genuine. Specific embodiments according to the present invention can determine whether a digital signature was generated by a digital signature generator, or if the digital signature was generated by a third party posing as the digital signature generator. Specific embodiments can provide independent verification of digital signer identity based upon prior signed messages, time/date stamps, and the like. Techniques according to the present invention can be embodied in methods, apparatus, computer software and systems.

Abstract: A time stamp generating system has a time distribution server for generating time data depending on time and a user PC for holding time certification objective digital data. The time distribution server generates time data corresponding to a time point and distributes the time data. The user PC calculates time stamp generating data by using the time certification objective data as an input, acquires the time data generated by the time distribution server, and processes the time data on the basis of the time stamp generating data to obtain a time stamp.

Abstract: The board issuing/managing system is provided with a processing unit to manage a board ID number and a processing unit to write a coded ID number into board data. Further, the certificate issuing system is provided with a processing unit to give an electronic signature of a certificate issuer to associated data to be written over the board data; a processing unit to transform encrypted associated data into code information that can be read by an information processing device; a processing unit to insert the board ID number as an electronic watermark when the associated data includes image data; and a processing unit to arrange the code information, the image data and the associated data on the board so that they do not overlap each other.

Abstract: An electronic document authenticity assurance technique and an information disclosure system both of which can compatibly realize the assurance of the authenticity of disclosure documents and the deletion of information inappropriate for disclosure. An electronic document is divided into constituent elements and an electronic signature is affixed to an arbitrary subset of a set including all the constituent elements. Otherwise, an electronic signature is affixed to data obtained by binding each of the constituent elements to information specifying the relationship between a respective one of the constituent elements and the structure of the electronic document. Otherwise, the hash values of the respective constituent elements are calculated and an electronic signature is affixed to data obtained by binding the calculated hash values together.

Abstract: In a signature generating method where not necessarily all of a plurality of signature generating devices work together each time to generate signatures, the present invention seeks to correctly and securely reflect data relating to previous signatures. When generating signatures, the data used for the next signature is sent beforehand to the other signature generating devices. Also, when generating signatures, at least one of the devices is used consecutively, thus allowing history data to be shared during signature generation.

Abstract: An authentication system for authenticating a particular individual using a recording medium containing information for identifying the individual has a recording medium issuing apparatus including, a database for storing a feature value usable for identification of the individual to be authenticated with the recording medium, means for managing the database to store the feature value of the individual to be authenticated with the recording medium and for generating search information to retrieve the feature value of the individual from the database, means for generating cryptographic information by encrypting the thus generated search information using a private key based on public key cryptography, and means for recording the thus generated cryptographic information and certification information concerning the individual onto the recording medium; and a recording medium authenticating apparatus including, means for decrypting the cryptographic information recorded on the recording medium using a public key

Abstract: A certificate issuing method includes inputting individual information of a certificate issuance requester, creating electronic data of a board having a background pattern that differs from certificate to certificate on a part thereof, overwriting individual information on the background pattern in the electronic data of the board with characters, entering a relation between the background pattern and the overwritten characters onto the board, and printing the electronic data as a certificate.

Abstract: A certificate method and system for issuing a certificate and verification thereof. The method of issuing includes utilization of a computer in which individual information of a certificate issuance requester is inputted, writing the individual information is written on electronic data of a board by using characters, and painting out a background portion of the individual information written with the characters, by using a plurality of colors according to a first predetermined rule. Further, the background portion of the individual information written with the characters is re-painted, according to a second predetermined rule by using information that differs from certificate to certificate, a certificate identification number and the information that differs from certificate to certificate is stored, the certificate identification number into is entered the electronic data of the board, and printing is effected of the electronic data as a certificate.

Abstract: A time stamp generating system has a time distribution server for generating time data depending on time and a user PC for holding time certification objective digital data. The time distribution server generates time data corresponding to a time point and distributes the time data. The user PC calculates time stamp generating data by using the time certification objective data as an input, acquires the time data generated by the time distribution server, and processes the time data on the basis of the time stamp generating data to obtain a time stamp.

Abstract: The present invention discloses a technology for providing a method in on-line shopping and the like that allows products to be delivered efficiently and with no delivery errors to intermediary establishments, e.g., convenience stores, where packages can be picked up at a location other than a user's home address. A computer is set up to mediate delivery and receives a user selection via a network regarding whether a product is to be shipped to the user's home or to another site. If another site is selected, a map of the area showing potential destinations is displayed, and the recipient makes a selection from the map. Special offers available when the package is picked up at a site are also displayed. When the recipient specifies a delivery destination, a coupon containing a recipient authentication certificate and special offers is issued.

Abstract: In a signature generating method where not necessarily all of a plurality of signature generating devices work together each time to generate signatures, the present invention seeks to correctly and securely reflect data relating to previous signatures.

Abstract: An insurance agency system 1100 notifies a payment intermediary system 1200 of a payment intention. When the payment intermediary system 1200 receives a payment intention notification, it notifies a beneficiary system 1300 of the payment intention. When the beneficiary system 1300 receives the payment intention notification, it notifies the payment intermediary system 1200 of a deposit account. If the payment intermediary system 1200 receives the deposit account notification before the payment due date or during a payment period specified by the payer, the amount specified by the payer is deposited in the deposit account.

Abstract: According to the present invention, a service issuing system 1110 comprises identification number issuing means 1120 for issuing an identification number 1130 required to receive a service in accordance with an application from a user system 1210, encryption means 1150 for encrypting the identification number 1130 and generating encrypted data 1160 by a private key 1140 corresponding to a public key owned by a service provider, and encryption means 1170 for encrypting the encrypted data 1160 and generating encrypted data 1180 by an encryption key 1240 corresponding to a decryption key owned by the user system 1210.