Title:
METHOD FOR EDITING ENCRYPTED CONTENT
Document Type and Number:
Japanese Patent JP2009020401
Kind Code:
A
Abstract:
To provide a method for editing encrypted content capable of speedily editing contents while keeping the protection of contents.
In the method for editing encrypted content in an information apparatus, the contents are protected by encrypting and storing the content in a first storage device and storing, as content use data, object data for preventing replacement or alteration of content in an access-controlled second storage device. The information apparatus encrypts the content in such a manner as to allow random access at the time of decryption, and performs editing processing by dividing, combining, deleting, and sorting the content without re-encrypting the content and the content use data.
Inventors:
SHIMODA MUTSUMI
Application Number:
JP2007184177A
Publication Date:
January 29, 2009
Filing Date:
July 13, 2007
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G09C1/00; G06F21/60; G06F21/62; G06F21/64; H04N5/91; H04N5/93; H04N7/167; H04N7/173; H04N21/433; H04N21/435; H04N21/4623
Domestic Patent References:
| JPH11331803A | 1999-11-30 | |||
| JP2005109861A | 2005-04-21 | |||
| JP2003319322A | 2003-11-07 | |||
| JP2001249695A | 2001-09-14 | |||
| JP2007110247A | 2007-04-26 | |||
| JP2006319954A | 2006-11-24 | |||
| JP2004348778A | 2004-12-09 | |||
| JP2007065811A | 2007-03-15 | |||
| JPH11331803A | 1999-11-30 | |||
| JP2005109861A | 2005-04-21 | |||
| JP2003319322A | 2003-11-07 | |||
| JP2001249695A | 2001-09-14 | |||
| JP2007110247A | 2007-04-26 | |||
| JP2006319954A | 2006-11-24 | |||
| JP2004348778A | 2004-12-09 |
Other References:
JPN6012048287; 下田睦: '地デジ搭載ＰＣの著作権保護システムの実装' 映像情報メディア学会技術報告 Ｖｏｌ． ３１，Ｎｏ． ４１, 20070920, ｐｐ． ７-１０, （社）映像情報メディア学会
CSNG200800107001; 下田睦: '地デジ搭載ＰＣの著作権保護システムの実装' 映像情報メディア学会技術報告 Ｖｏｌ． ３１，Ｎｏ． ４１, 20070920, ｐｐ． ７-１０, （社）映像情報メディア学会
JPN6012048287; 下田睦: '地デジ搭載ＰＣの著作権保護システムの実装' 映像情報メディア学会技術報告 Ｖｏｌ． ３１，Ｎｏ． ４１, 20070920, ｐｐ． ７-１０, （社）映像情報メディア学会
CSNG200800107001; 下田睦: '地デジ搭載ＰＣの著作権保護システムの実装' 映像情報メディア学会技術報告 Ｖｏｌ． ３１，Ｎｏ． ４１, 20070920, ｐｐ． ７-１０, （社）映像情報メディア学会
JPN6012048287; 下田睦: '地デジ搭載ＰＣの著作権保護システムの実装' 映像情報メディア学会技術報告 Ｖｏｌ． ３１，Ｎｏ． ４１, 20070920, ｐｐ． ７-１０, （社）映像情報メディア学会
Attorney, Agent or Firm:
Yamato Tsutsui