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 7,783,890 B2
• Filed: 09/13/2005
• Issued: 08/24/2010
• Est. Priority Date: 09/14/2004
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Watanabe, Yoshikazu
• Primary Examiner(s): Zand; Kambiz
• Assistant Examiner(s): Gee; Jason K
• Application Number:
  US11/223,941
• Publication Number:
  US 20060059201A1
• Time in Patent Office: 1,806 Days
• Field of Search: 713/181
• US Class Current: 713/181
• 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 system which verifies whether or not a multimedia data element is created from an intended object, comprising:

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

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,

the multimedia recording apparatus comprising

a capture device to create the multimedia data element from the object and record the multimedia data element,

a wireless reading device configured to acquire an object-specifying data element, which specifies the object, from a wireless transmission device of the object,

a system controller configured to create a digest data element from the multimedia data element, create an authentication data element by encrypting the digest data element with the object-specifying data element, and embed the authentication data element in a header information of the multimedia data element, and

a recording device configured to record the multimedia data element and the authentication data element embedded in the header information of the multimedia data element,

the verification apparatus configured to send a first digest data element created from the multimedia data element to the server apparatus,

the server apparatus comprising a server controller configured

to decrypt the authentication data element embedded in the header information of the multimedia data element by using an object-specifying data element, which was previously registered on the server apparatus, as a key to create a second digest data element,

to compare the second digest data element with the first digest data element of the multimedia recording apparatus, and

to output a result of the comparison of the first digest data element and the second digest data element as a comparison data element, and

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

2. The multimedia recording system according to claim 1, wherein

the wireless transmission device of the object is configured to provide the object-specifying data element to the multimedia recording apparatus, and

the object-specifying data element 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.

3. The multimedia recording system according to claim 1, wherein the multimedia data element comprises a still image data element, a movie data element, or a sound data element.

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

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

6. A multimedia recording system which verifies whether or not a multimedia data element is created from an intended object, comprising:

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

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,

the multimedia recording apparatus comprising

a capture device to create the multimedia data element from the object and record the multimedia data element,

a wireless reading device configured to acquire a first of a plurality of object-specifying data elements, which specifies the object, from a wireless transmission device of the object,

a system controller configured to create a digest data element from the multimedia data element, create an authentication data element by encrypting the digest data element with the first object-specifying data element and embed the authentication data element in a header information of the multimedia data element, and

a recording device configured to record the multimedia data element and the authentication data element embedded in the header information of the multimedia data element,

the verification apparatus configured to send a first digest data element created from the multimedia data element to the server apparatus,

the server apparatus comprising

a retaining device configured to retain date and time information sent from the verification apparatus through the communication network and the plurality of object-specifying data elements, and

a server controller configured to search for a second of the plurality of object-specifying data elements 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 data element, 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 comprising

a verification apparatus controller configured to decrypt the authentication data element of the multimedia recording apparatus by using the second object-specifying data element, which is sent from the server apparatus through the communication network, as a key to create a second digest data element, and to compare the second digest data element with the first digest data element of the multimedia recording apparatus, and

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

7. The multimedia recording system according to claim 6, wherein

the wireless transmission device of the object is configured to provide the first object-specifying data element to the multimedia recording apparatus and provide the second object-specifying data element to the server apparatus, and

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 data element and provides the other of the key data to the server apparatus as the second object-specifying data element.

8. The multimedia recording system according to claim 7, further comprising a system control unit configured to regularly update the key data.

9. The multimedia recording system according to claim 6, wherein the multimedia data element comprises a still image data element, a movie data element, or a sound data element.

10. The multimedia recording system according to claim 6, wherein the system controller of the multimedia recording apparatus discards the acquired first object-specifying data element every time when a predetermined recording to the recording device is carried out.

11. The multimedia recording system according to claim 10, 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 data element every time when a predetermined period of time elapses according to timekeeping of the timer.