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Title:
DATA RECORDING DEVICE, AND DATA DELETING METHOD FOR USE IN THE DATA RECORDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/104119
Kind Code:
A1
Abstract:
A data recording device selects plural pieces of data corresponding to encryption key information in an ECC block formed in an optical disk, and forms, at the position of a recording bit string corresponding to the individual selected data pieces, an overwrite bit string different in format from that recording bit string. Thus, the encryption key information can be stably deleted without any instability in a servo.

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Inventors:
YAMANAKA YUTAKA (JP)
Application Number:
PCT/JP2006/306217
Publication Date:
October 05, 2006
Filing Date:
March 28, 2006
Export Citation:
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Assignee:
NEC CORP (JP)
YAMANAKA YUTAKA (JP)
International Classes:
G11B20/18; G11B7/0045; G11B7/007; G11B20/10
Foreign References:
JP2005038490A2005-02-10
JP2003151210A2003-05-23
JP2001189015A2001-07-10
JP2002117546A2002-04-19
Attorney, Agent or Firm:
Kudoh, Minoru (24-10 Minamiooi 6-chome, Shinagawa-k, Tokyo 13, JP)
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