PROCESSING CONTEXT INFORMATION

• US 20120328093A1
• Filed: 08/30/2012
• Published: 12/27/2012
• Est. Priority Date: 06/22/2011
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Kudo, Michiharu
• Granted Patent: US 8,811,607 B2
• Time in Patent Office: Days
• US Class Current: 380/28
• CPC Class Codes: B25J 11/008 Manipulators for service tasks
• CPC Class Codes: B25J 9/0003 Home robots, i.e. small robots for domestic use
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: G06F 21/6254 by anonymising data, e.g. decorrelating personal data from the owner's identification
• CPC Class Codes: H04L 2209/42 Anonymization, e.g. involving pseudonyms
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 2209/805 Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04L 9/0894 Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage

Abstract

A method and system for generating contexts of targets to estimate a high-order context. The system includes: a detection device including: a sensor for detecting a target; module for extracting the target and a primary context of the target based on data detected by the sensor; and module for encrypting the primary context with a key corresponding to the target; a storage device for recording encrypted primary context from the detection device; and a processing device including: module for receiving the encrypted primary context from the storage device; module for receiving the key corresponding to the target involved in the encrypted primary context; module for decrypting the encrypted primary context using received key; and module for estimating a high-order context using the decrypted primary context; where the processing device further includes a module for requesting the detection device to delete information on a key corresponding to a specific target.

Claims

1. A method of generating contexts of targets to estimate a high-order context from a plurality of contexts, the method comprising the steps of:

recording, by using a detection device, an encrypted primary context in a storage device, said detection device comprising;

a sensor for detecting a target;

module for extracting said target and a primary context of said target based on data detected by said sensor; and

module for encrypting said primary context with a key corresponding to said target;

receive thing said encrypted primary context from said storage device;

receiving said key corresponding to said target involved in said encrypted primary context;

decrypting said encrypted primary context using received key; and

requesting said detection device to delete information of a key corresponding to a specific target;

wherein at least one of the steps is carried out using a computer device.

2. The method according to claim 1, wherein:

said detection device is a robot; and

said sensor comprises an image sensor and a microphone.

3. The method according to claim 1, wherein said detection device further comprises a first correspondence table comprising entries of a real name of said target, an identification name of said target, and said key corresponding to said target.

4. The method according to claim 3, wherein said detection device further comprises a second correspondence table comprising entries of a time interval of said primary context and an identification name of a target associated with said primary context.

5. The method according to claim 4, wherein information on said time interval of said primary context is added in an unencrypted format to information on said encrypted primary context sent from said detection device to said storage device.

6. The method according to claim 5, wherein said step of receiving said encrypted primary context from said storage device further comprises the step of;

inquiring said storage device during said time interval of said primary context.

7. The method according to claim 1, wherein:

encryption is of an AES encryption type; and

said key is 128 bits.

8. The method according to claim 1, further comprising a plurality of said detection devices, the method further comprises the steps of:

creating a coordinated context key for a target detected by another detection device from said plurality of said detection devices under a predetermined condition; and

encrypting a context corresponding to said predetermined condition by using said coordinated context key.

9. The method according to claim 1, wherein said storage device is offered by a cloud computing storage service.