Claims
- 1. A signature system presenting a receiver with signature information of a user, comprising:
an input unit inputting the identification information of the user; and an output unit outputting information for generation of the signature information according to the input identification information in a format readable by a bar cord reader.
- 2. The system according to claim 1, wherein
said output unit encrypts and outputs the identification information.
- 3. The system according to claim 1, wherein
said input unit inputs authentication information, which is significant and repeatedly reproducible by the user, as the identification information.
- 4. The system according to claim 1, wherein
said input unit inputs image data of an image of a seal as the identification information.
- 5. The system according to claim 1, wherein
said output unit outputs program information for generation of illegal use prevention information for protection against an illegal use.
- 6. The system according to claim 5, wherein
said program information contains a one-directional function, and is used in generating blind information of use information using the one-directional function, and generating the illegal use prevention information containing the blind information.
- 7. The system according to claim 5, wherein
said program information contains an encryption key, and is used in generating blind information of use information using the encryption key, and generating the illegal use prevention information containing the blind information.
- 8. The system according to claim 5, wherein
said program information is prepared such that, after the signature information is generated according to the information for generation of the signature information to present the signature information to the receiver, the program information itself can be removed from memory.
- 9. A signature system presenting signature information of a user to a receiver, comprising:
a reading unit reading information in a bar code format; and a generation unit generating the signature information according to the read information.
- 10. The system according to claim 9, wherein
said generation unit adds illegal use prevention information for protection against an illegal use to the read information, and generates the signature information.
- 11. The system according to claim 10, wherein
said reading unit reads program information for generation of the signature information; and said generation unit generates the illegal use prevention information according to the program information.
- 12. The system according to claim 10, further comprising:
a timer unit generating date and time information used as the illegal use prevention information.
- 13. The system according to claim 9, further comprising:
a management unit managing blind information of identification information contained in the information in the bar code format; and a comparison unit generating blind information of the identification information from the signature information, and comparing the obtained blind information with blind information managed by said management unit.
- 14. The system according to claim 13, further comprising
an issue unit issuing certification information containing the blind information of the identification information.
- 15. A signature system, comprising:
an input unit through which a user inputs authentication information, which is significant and repeatedly reproducible by the user; a generation unit generating blind information of the authentication information; and an entry unit entering the blind information in a device verifying signature information according to the authentication information.
- 16. The system according to claim 15, wherein
said entry unit enters in the device verifying the signature a one-directional function and an encryption key, which are used to generate the blind information and required to authenticate a user.
- 17. The system according to claim 15, wherein
said input unit and said generation unit are provided in a terminal of the user.
- 18. The system according to claim 15, wherein
when said user presents the signature information to a receiver for authentication, said user re-enters the authentication information through said input unit; and said generation unit generates the signature information from the re-entered authentication information.
- 19. The system according to claim 18, further comprising:
a generation unit newly generating blind information from the re-entered authentication information using a one-directional function and an encryption key entered in the device verifying the signature information; and a comparison unit reading blind information entered in the device, and comparing the blind information with the newly generated blind information.
- 20. The system according to claim 19, further comprising
a deletion unit removing the re-entered authentication information from memory after the newly generated blind information is compared with the blind information entered in the device.
- 21. The system according to claim 15, wherein
said input unit selectively inputs the authentication information from among a plurality of items in an interactive mode with said user.
- 22. The system according to claim 21, wherein
said input unit changes the number of input items of the authentication information depending on a usage of the signature information.
- 23. The system according to claim 15, wherein
after entering the blind information, said entry unit removes the authentication information based on which the blind information is generated in order to avoid an illegal use by others.
- 24. A computer-readable storage medium storing a program used to direct a computer to perform:
inputting identification information of a user; generating information for generation of signature information of the user according to the input identification information; and outputting the generated information in a format readable by a bar code reader.
- 25. A computer-readable storage medium storing a program used to direct a computer to perform:
reading information in a bar code format; and generating signature information of a user based on the read information.
- 26. A computer-readable storage medium storing a program used to direct a computer to perform:
inputting authentication information, which is significant and repeatedly reproducible by a user; generating blind information of the authentication information; and entering the blind information in a device verifying signature information according to the authentication information.
- 27. A signature system presenting a receiver with signature information of a user, comprising:
input means for inputting the identification information of the user; and output means for outputting information for generation of the signature information according to the input identification information in a format readable by a bar cord reader.
- 28. A signature system presenting signature information of a user to a receiver, comprising:
reading means for reading information in a bar code format; and generation means for generating the signature information according to the read information.
- 29. A signature system, comprising:
input means through which a user inputs authentication information, which is significant and repeatedly reproducible by the user; generation means for generating blind information of the authentication information; and entry means for entering the blind information in a device verifying signature information according to the authentication information.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-220658 |
Aug 1998 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of International PCT Application No. PCT/JP99/04185 filed on Aug. 3, 1999.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP99/04185 |
Aug 1999 |
US |
Child |
09771896 |
Jan 2001 |
US |