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1. (WO2011151982) MEDIA ENCRYPTION DEVICE, MEDIA ENCRYPTION AND DECRYPTION DEVICE, METHOD OF MEDIA ENCRYPTION, AND METHOD OF MEDIA ENCRYPTION AND DECRYPTION

Pub. No.:    WO/2011/151982    International Application No.:    PCT/JP2011/002732
Publication Date: Dec 8, 2011 International Filing Date: May 17, 2011
IPC: H04L 9/36
G06F 21/10
H04N 7/167
Applicants: Mitsubishi Electric Corporation
三菱電機株式会社
KUDO, Daiki
工藤 大樹
IDEHARA, Yuichi
出原 優一
KUSANO, Katsuhiro
草野 勝大
NISHIKAWA, Hirofumi
西川 博文
Inventors: KUDO, Daiki
工藤 大樹
IDEHARA, Yuichi
出原 優一
KUSANO, Katsuhiro
草野 勝大
NISHIKAWA, Hirofumi
西川 博文
Title: MEDIA ENCRYPTION DEVICE, MEDIA ENCRYPTION AND DECRYPTION DEVICE, METHOD OF MEDIA ENCRYPTION, AND METHOD OF MEDIA ENCRYPTION AND DECRYPTION
Abstract:
In a media encryption device, a dynamic image compression unit (101) compresses video data and generates compressed video data which includes a header storing basic information of the video data and macroblock data storing the variable-length code of the video data. An encryption processing determination unit (102) identifies as encryption portions the leading portion of each header in the compressed video data and the portion extending from the tail end of a slice header to the head of the macroblock data, and an encryption processing unit (103) encrypts the identified portions while generating encrypted portion information indicative of the encrypted portions.