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Patent Searching and Data


Title:
REPRODUCTION DEVICE AND REPRODUCTION METHOD
Document Type and Number:
Japanese Patent JP2018011091
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To shorten the time for acquiring a key that is required for reproducing an encrypted content, over a network.SOLUTION: An encrypted content acquisition part 1001 acquires an encrypted content from an optical disk 3 and a key determination part 1002 determines whether to use first key information that is recorded on the optical disk 3 and in a case where it is determined that the first key information is not used, a second key information acquisition part 1004 acquires second key information to be required for reproducing the encrypted content over a network. A reproduction part 1005 uses the second key information to decrypt and reproduce the encrypted content. The encrypted content to be first reproduced by the reproduction part 1005 is encrypted by the first key and while the encrypted content to be first reproduced is reproduced, the second key information acquisition part 1004 acquires the second key information over the network.SELECTED DRAWING: Figure 12

Inventors:
YAMAMOTO MASAYA
OGAWA TOMOTERU
YABANETA HIROSHI
TOMA TADAMASA
MURASE KAORU
KOZUKA MASAYUKI
Application Number:
JP2014179133A
Publication Date:
January 18, 2018
Filing Date:
September 03, 2014
Export Citation:
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Assignee:
PANASONIC IP CORP AMERICA
International Classes:
H04L9/08; G11B20/10; H04L9/14
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Shinsuke Otsuki