Multimedia recording apparatus, object-specifying information providing apparatus, server apparatus, verification apparatus, multimedia recording method, object-specifying information providing method, server method, verification method, and multimedia recording system

• US 20060059201A1
• Filed: 09/13/2005
• Published: 03/16/2006
• Est. Priority Date: 09/14/2004
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Watanabe, Yoshikazu
• Granted Patent: US 7,783,890 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04N 1/32 Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device H04N1/38, H04N1/387 take precedence
• CPC Class Codes: H04N 1/32101 Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title

Abstract

A multimedia recording system verifies whether or not multimedia data created from an object belongs to the intended object, and has a multimedia recording apparatus which acquires object-specifying information specifying the object, creates first digest data from the multimedia data and creates authentication data by encrypting the first digest data with the object-specifying information, and records the authentication data, a server apparatus which decrypts the authentication data by using the object-specifying information previously registered on the server apparatus to create second digest data, compares the second digest data with the first digest data of the multimedia recording apparatus, and outputs a result of comparison of the first digest data and the second digest data as comparison data, and a verification apparatus which displays a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on the comparison data sent from the server apparatus.

Claims

1. A multimedia recording apparatus used for a system which verifies whether or not multimedia data created from an object belongs to the intended object, the multimedia recording apparatus introducing the multimedia data from the object and recording the multimedia data, comprising:

a wireless reading device configured to acquire object-specifying information which specifies the object;

a system controller configured to create digest data from the multimedia data and create authentication data by encrypting the digest data with the object-specifying information; and

a recording device configured to record the authentication data.

2. The multimedia recording apparatus according to claim 1, wherein the multimedia data is still image data, movie data, or sound data.

3. The multimedia recording apparatus according to claim 1, wherein the system controller discards the acquired object-specifying information every time when a predetermined recording to the recording device is carried out.

4. The multimedia recording apparatus according to claim 3, wherein the system controller comprises a timer configured to measure elapse of time, and discards the acquired object-specifying information every time when a predetermined period of time elapses according to timekeeping of the timer.

5. An object-specifying information providing apparatus used for the system which verifies whether or not the multimedia data created from the object belongs to the intended object, the object-specifying information providing apparatus providing the object-specifying information to the multimedia recording apparatus according to claim 1, wherein

the object-specifying information providing apparatus comprises a key-pair creating unit configured to create a pair of key data based on a public key cryptosystem, and provides one of the key data to the multimedia recording apparatus as the object-specifying information.

6. The object-specifying information providing apparatus according to claim 5, further comprising a system control unit configured to regularly update the object-specifying information.

7. A server apparatus used for a system which verifies whether or not multimedia data created from an object belongs to the intended object, the server apparatus comprising;

a server controller configured to create first digest data from authentication data received from a communication network by using object-specifying information previously registered on the server apparatus as a key, compare the first digest data with second digest data received from the communication network, and output a result of the comparison of the first digest data and the second digest data as comparison data.

8. A verification apparatus used for the system which verifies whether or not the multimedia data created from the object belongs to the intended object, the verification apparatus comprising:

a display device configured to display a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on the comparison data sent from the server apparatus according to claim 7.

9. A server apparatus used for a system which verifies whether or not multimedia data created from an object belongs to the intended object, the server apparatus comprising:

a retaining device configured to retain date and time information received from a communication network and object-specifying information; and

a server controller configured to search the object-specifying information retained in the retaining device based on the date and time information received from the communication network, wherein

the server controller sends the object-specifying information which corresponds to the date and time information based on a result of search to the communication network.

10. A verification apparatus used for the system which verifies whether or not the multimedia data created from the object belongs to the intended object, the verification apparatus comprising:

a verification apparatus controller configured to create first digest data from authentication data by using the object-specifying information sent from the server apparatus through the communication network according to claim 9, compare the first digest data with second digest data and output a result of the comparison as comparison data; and

a display device configured to display a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on the result of the comparison of the verification apparatus controller.

11. A multimedia recording method used for a system which verifies whether or not multimedia data created from an object belongs to the intended object, the multimedia recording method introducing the multimedia data from the object and recording the multimedia data, the method comprising:

acquiring object-specifying information which specifies the object;

creating digest data from the multimedia data;

creating authentication data by encrypting the digest data with the object-specifying information; and

recording the authentication data.

12. The multimedia recording method according to claim 11, wherein the multimedia data is still image data, movie data, or sound data.

13. The multimedia recording method according to claim 11, the method comprising:

discarding the acquired object-specifying information every time when a predetermined recording being carried out.

14. The multimedia recording method according to claim 13, the method comprising:

discarding the acquired object-specifying information every time when a predetermined period of time elapses.

15. An object-specifying information providing method used for the system which verifies whether or not the multimedia data created from the object belongs to the intended object, the object-specifying information providing method providing the object-specifying information to the multimedia recording method according to claim 11, wherein

the object-specifying information is one of a pair of key data based on a public key cryptosystem.

16. The object-specifying information providing method according to claim 15, wherein the object-specifying information is regularly updated.

17. A server method used for a system which verifies whether or not multimedia data created from an object belongs to the intended object, the server method comprising;

creating first digest data from authentication data received from a communication network by using object-specifying information previously recorded as a key;

comparing the first digest data with second digest data received from the communication network; and

outputting a result of the comparison of the first digest data and the second digest data as comparison data.

18. A verification method used for the system which verifies whether or not the multimedia data created from the object belongs to the intended object, the verification method comprising:

displaying a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on the comparison data sent by the server method according to claim 17.

19. A server method used for a system which verifies whether or not multimedia data created from an object belongs to the intended object, the server method comprising:

retaining date and time information received from a communication network and object-specifying information;

searching the retained object-specifying information based on the date and time information received from the communication network; and

sending the object-specifying information which corresponds to the date and time information based on a result of search to the communication network.

20. A verification method used for the system which verifies whether or not the multimedia data created from the object belongs to the intended object, the verification method comprising:

creating first digest data from authentication data by using the object-specifying information sent by the server method through the communication network according to claim 19;

comparing the first digest data with second digest data; and

displaying a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on a result of the comparison.

21. A multimedia recording system which verifies whether or not multimedia data created from an object belongs to the intended object, comprising:

a multimedia recording apparatus configured to introduce the multimedia data from the object and record the multimedia data;

a server apparatus configured to perform predetermined processes according to data received from a communication network; and

a verification apparatus connected with the server apparatus through the communication network, wherein

the multimedia recording apparatus comprises a wireless reading device configured to acquire object-specifying information which specifies the object, a system controller configured to create first digest data from the multimedia data and create authentication data by encrypting the first digest data with the object-specifying information, and a recording device configured to record the authentication data,

the server apparatus comprises a server controller configured to decrypt the authentication data sent from the verification apparatus through the communication network by using the object-specifying information previously registered on the server apparatus as a key to create second digest data, compare the second digest data with the first digest data of the multimedia recording apparatus sent from the verification apparatus through the communication network, and output a result of comparison of the first digest data and the second digest data as comparison data, and

the verification apparatus comprises a display device configured to display a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on the comparison data sent from the server apparatus.

23. The multimedia recording system according to claim 21, further comprising a wireless transmission device configured to provide the object-specifying information to the multimedia recording apparatus, wherein the object-specifying information provided to the multimedia recording apparatus by the wireless transmission device and the object-specifying information previously registered on the server apparatus are the same based on a common key cryptosystem.

26. The multimedia recording system according to claim 21, wherein the multimedia data is still image data, movie data, or sound data.

28. The multimedia recording system according to claim 21, wherein the system controller of the multimedia recording apparatus discards the acquired object-specifying information every time when a predetermined recording to the recording device is carried out.

30. The multimedia recording system according to claim 28, wherein the system controller of the multimedia recording apparatus comprises a timer configured to measure elapse of time, and discards the acquired object-specifying information every time when a predetermined period of time elapses according to timekeeping of the timer.

22. A multimedia recording system which verifies whether or not multimedia data created from an object belongs to the intended object, comprising:

a multimedia recording apparatus configured to introduce the multimedia data from the object and record the multimedia data;

a server apparatus configured to perform predetermined processes according to data received from a communication network; and

a verification apparatus connected with the server apparatus through the communication network, wherein

the multimedia recording apparatus comprises a wireless reading device configured to acquire first object-specifying information which specifies the object, a system controller configured to create first digest data from the multimedia data and create authentication data by encrypting the first digest data with the first object-specifying information, and a recording device configured to record the authentication data,

the server apparatus comprises a retaining device configured to retain date and time information sent from the verification apparatus through the communication network and second object-specifying information, and a server controller configured to search the second object-specifying information retained in the retaining device based on the date and time information sent from the verification apparatus through the communication network and send the second object-specifying information which corresponds to the date and time information based on a result of search to the verification apparatus through the communication network, and

the verification apparatus comprises a verification apparatus controller configured to decrypt the authentication data of the multimedia recording apparatus by using the second object-specifying information sent from the server apparatus through the communication network as a key to create second digest data, and compare the second digest data with the first digest data of the multimedia recording apparatus, and a display device configured to display a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on a result of the comparison of the verification apparatus controller.

24. The multimedia recording system according to claim 22, further comprising a wireless transmission device configured to provide the first object-specifying information to the multimedia recording apparatus and provide the second object-specifying information to the server apparatus, wherein the wireless transmission device comprises a key-pair creating unit configured to create a pair of key data based on a public key cryptosystem, and provides one of the key data to the multimedia recording apparatus as the first object-specifying information and provides the other of the key data to the server apparatus as the second object-specifying information.

25. The multimedia recording system according to claim 24, further comprising a system control unit configured to regularly update the key data.

27. The multimedia recording system according to claim 22, wherein the multimedia data is still image data, movie data, or sound data.

29. The multimedia recording system according to claim 22, wherein the system controller of the multimedia recording apparatus discards the acquired first object-specifying information every time when a predetermined recording to the recording device is carried out.

31. The multimedia recording system according to claim 29, wherein the system controller of the multimedia recording apparatus comprises a timer configured to measure elapse of time, and discards the acquired first object-specifying information every time when a predetermined period of time elapses according to timekeeping of the timer.

32. A multimedia recording method of a multimedia recording system which verifies whether or not multimedia data created from an object belongs to the intended object, the method comprising:

acquiring object-specifying information which specifies the object;

creating first digest data from the multimedia data;

creating authentication data by encrypting the first digest data with the object-specifying information;

recording the authentication data;

decrypting the authentication data by using the object-specifying information previously registered as a key to create second digest data;

comparing the second digest data with the first digest data;

outputting a result of comparison of the first digest data and the second digest data as comparison data, and

displaying a result of verification of whether or not the multimedia data created from the object belongs to the intended object based on the comparison data.

34. The multimedia recording method of the multimedia recording system according to claim 32, the method comprising:

preparing the object-specifying information, wherein the prepared object-specifying information and the object-specifying information previously registered are the same based on a common key cryptosystem.

37. The multimedia recording method of the multimedia recording system according to claim 32, wherein the multimedia data is still image data, movie data, or sound data.

39. The multimedia recording method of the multimedia recording system according to claim 32, the method comprising:

discarding the acquired object-specifying information every time when a predetermined recording being carried out.

41. The multimedia recording method of the multimedia recording system according to claim 39, the method comprising:

discarding the acquired object-specifying information every time when a predetermined period of time being elapsed.

33. A multimedia recording method of a multimedia recording system which verifies whether or not multimedia data created from an object belongs to the intended object, the method comprising:

acquiring first object-specifying information which specifies the object;

creating first digest data from the multimedia data;

creating authentication data by encrypting the first digest data with the first object-specifying information;

recording the authentication data;

retaining date and time information and second object-specifying information;

searching the retained second object-specifying information based on the date and time information;

outputting the second object-specifying information which corresponds to the date and time information based on a result of search;

decrypting the authentication data by using the second object-specifying information as a key to create second digest data;

comparing the second digest data with the first digest data, and

displaying a result of verification of whether or not whether or not the multimedia data created from the object belongs to the intended object based on a result of the comparison.

35. The multimedia recording method of the multimedia recording system according to claim 33, the method comprising:

creating a pair of key data based on a public key cryptosystem;

preparing one of the key data as the first object-specifying information; and

preparing the other of the key data as the second object-specifying information.

36. The multimedia recording method of the multimedia recording system according to claim 35, the method comprising:

regularly updating the key data.

38. The multimedia recording method of the multimedia recording system according to claim 33, wherein the multimedia data is still image data, movie data, or sound data.

40. The multimedia recording method of the multimedia recording system according to claim 33, the method comprising:

discarding the acquired first object-specifying information every time when a predetermined recording being carried out.

42. The multimedia recording method of the multimedia recording system according to claim 40, the method comprising:

discarding the acquired first object-specifying information every time when a predetermined period of time being elapsed.