映像情報メディア学会誌
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
特集論文
一方向性ハッシュ関数を用いたディジタル動画像の効果的アクセス制御方式
今泉 祥子阿部 淑人藤吉 正明貴家 仁志
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2010 年 64 巻 11 号 p. 1621-1627

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We describe an efficient access control method for digital videos that controls access to video frames based on one-way hash functions. The method offers effective key management and delivery as well as conventional scalability-aware access control methods for coded still images. It uses hash chain-based key generation, thereby limiting the number of managed keys to one, and the user receives only one key as well. This method controls access to a video sequence based on frame rates, and it is applicable to access control of videos based on movie ratings. For access control with two controlled subjects, our method reduces the number of keys to the theoretical lower limit.

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© 2010 一般社団法人 映像情報メディア学会
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