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Title:
COMMUNICATION DEVICE, COMMUNICATION METHOD, READER/WRITER, AND COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP2009276916
Kind Code:
A
Abstract:

To provide a new improved technique for reading and writing at high speed while allowing a reader/writer to ensure safety on data possessed by a communication device.

When receiving an encryption key encrypted by a key identical to a common key recoded in a record section 106 from the reader/writer via an antenna 101, a control section 104 of the communication device 12 decrypts the encrypted key by the common key recorded in the record section 106. When a reading-target address, which is encrypted using a key identical to the encryption key by the reader/writer and is used to designate a data source address in the record section 106, is received from the reader/writer via the antenna 101, the control section decrypts the encrypted reading-target address by the encryption key, data recorded in an area designated by the reading-target address obtained by decryption out of an area in the record section 106 is transmitted to the reader/writer via the antenna 101.


Inventors:
KANEMOTO TOSHINORI
SHIGA SADAICHI
Application Number:
JP2008126151A
Publication Date:
November 26, 2009
Filing Date:
May 13, 2008
Export Citation:
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Assignee:
SONY CORP
International Classes:
G06K17/00; G06F21/60; G06F21/62; G09C1/00; H04B1/59
Domestic Patent References:
JP2007293788A2007-11-08
JP2007293481A2007-11-08
JP2006094068A2006-04-06
Attorney, Agent or Firm:
Miaki Kametani
Tetsuo Kanamoto
Koji Hagiwara



 
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