SYSTEM AND METHOD OF ONLINE DECIPHERING DATA ON STORAGE MEDIUM

• US 20020032658A1
• Filed: 07/05/1996
• Published: 03/14/2002
• Est. Priority Date: 07/21/1995
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: OKI, HIROSHI, KAMATA, SHINJI, TANIKAWA, SEIJUN
• Granted Patent: US 6,523,117 B2
• Time in Patent Office: Days
• US Class Current: 705/51
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00855 involving a step of exchanging information with a remote server
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/062 for key distribution, e.g. centrally by trusted party cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819

Abstract

The user mounts a distributed storage medium in his or her terminal unit, selects desired information from stored information, and notifies the host central computer through a network. The host computer generates key information for use in deciphering the selected information by combining the identifier of the selected information, user identification, etc. and sends the key information to a user terminal unit. The user deciphers the selected information according to the transmitted key information, and then accesses the information.

Claims

1. An online deciphering system comprising:

communicating means for transmitting information to and from a user terminal unit through a communications network; and

interactive means for online releasing the enciphered information on a storage medium of a user from a cryptogram according to order information received from the user terminal unit in an interactive mode.

2. The online deciphering system according to claim 1, wherein

said interactive means online transmits a first key information for use in accessing information stored on the storage medium to the user terminal unit through said communicating means according to the order information.

3. The online deciphering system according to claim 2, further comprising:

information storage means for storing a second key information specific to the information stored on the storage medium, wherein

said interactive means searches said information storage means according to the order information, retrieves the second key information corresponding to ordered information specified by the order information, and transmits to the user terminal unit the first key information generated using the second key information.

4. The online deciphering system according to claim 3, further comprising:

key generating means for generating the first key information based on the second key information and user terminal unit identification information contained in the order information.

5. The online deciphering system according to claim 3, further comprising:

key generating means for generating the first key information based on the second key information and user identification information contained in the order information.

6. The online deciphering system according to claim 3, further comprising:

key generating means for generating the first key information based on the user identification information, the user terminal unit identification information, and the second key information.

7. The online deciphering system according to claim 2, wherein

said interactive means receives the order information from the user terminal unit, and transmits the first key information to the user terminal unit by electronic mail.

8. The online deciphering system according to claim 2, wherein

said interactive means instructs the user to input the first key information transmitted to the user terminal unit and confirms input key information.

9. The online deciphering system according to claim 1, wherein

said storage medium is a compact disk read only memory.

10. The online deciphering system according to claim 1, wherein

said interactive means receives the order information comprising a plurality of items from the user terminal unit in a file format.

11. The online deciphering system according to claim 1, wherein

said interactive means receives the order information comprising a plurality of items from the user terminal unit through manual input.

12. The online deciphering system according to claim 11, wherein

said interactive means allows the user to omit inputting known items among the plurality of items contained in the order information.

13. The online deciphering system according to claim 1, further comprising:

information storage means for storing a comment for each piece of the information stored on the storage medium, wherein

said interactive means outputs a message for each piece of the information stored on the storage medium.

15. The terminal device according to claim 14, wherein

said order output means outputs the order information comprising a plurality of items in a file format.

16. The terminal device according to claim 14, wherein

said order output means outputs the order information comprising a plurality of items one item at a time.

17. The terminal device according to claim 14, wherein

said deciphering means automatically reads a file storing the first key information received from the deciphering center, and for extracting the first key information from the file.

18. The terminal device according to claim 17, wherein

said deciphering means further comprises an automatic piloting means for automatically storing in the file the first key information received from the deciphering center.

14. A terminal device comprising:

means for mounting an enciphered storage medium;

order output means for accessing a deciphering center through a communications network, selecting information stored on the enciphered storage medium through interaction with the deciphering center, and outputting order information to the deciphering center; and

deciphering means for online receiving a first key information for use in retrieving the selected information from the enciphered storage medium, and for accessing the selected information on the enciphered storage medium according to the first key information.

19. A computer-readable storage medium used to direct a computer to perform, when used in the computer, the functions of:

accessing a deciphering center through a communications network, selecting information stored on an enciphered storage medium through interaction with the deciphering center, and outputting order information to the deciphering center; and

online receiving a first key information for use in accessing the selected information on the enciphered storage medium, and for accessing the selected information on the enciphered storage medium according to the first key information.

20. A computer-readable storage medium used to direct a computer to perform, when used in the computer, the functions of:

accessing a deciphering center through a communications network, selecting information stored on the storage medium through interaction with the deciphering center, and outputting order information to the deciphering center; and

online receiving a first key information for use in accessing the selected information from the storage medium, and for accessing the selected information on the storage medium according to the first key information.

21. An online deciphering system comprising:

communicating means for transmitting information to and from a user terminal unit through a communications network; and

interactive means for online transmitting information required to decipher enciphered information on a storage medium of a user according to order information received from the user terminal unit in an interactive mode.

22. An online deciphering system for use with a communications system connecting a user terminal unit with a deciphering center through a communications network, said system comprising:

order output means for accessing the deciphering center through the communications network, selecting information stored on an enciphered storage medium in an interactive mode, and outputting order information to the deciphering center;

interactive means for online transmitting to the user terminal unit a first key information for use in accessing the selected information on the enciphered storage medium in the user terminal unit through the communications network according to the order information received from said order output means in the interactive mode; and

deciphering means for accessing the selected information on the enciphered storage medium using the first key information received from said interactive means.

24. The online deciphering method according to claim 23, wherein

a first key information is generated for use in accessing information stored on an enciphered storage medium according to the order information received from the user terminal unit provided with the enciphered storage medium;

and

the first key information is online transmitted to the user terminal unit through the communications network.

23. An online deciphering method comprising the steps of:

receiving order information from a user terminal unit, in which a storage medium is mounted, through a communications network; and

online releasing enciphered information stored on the storage medium from a cryptogram through the communications network according to the order information.

25. An online deciphering method comprising the steps of:

mounting an enciphered storage medium in a user terminal unit;

accessing a deciphering center through a communications network, selecting information stored on the enciphered storage medium through interaction with the deciphering center, and outputting order information to the deciphering center;

online receiving a first key information for use in accessing the selected information on the enciphered storage medium through a communications network; and

accessing the selected information on the enciphered storage medium according to the first key information.