Progressive Access Control for JPEG 2000 Encoded Images

カテゴリ: 部門大会

論文No: GS13-4

グループ名: 【C】平成18年電気学会電子・情報・システム部門大会講演論文集

発行日: 2006/09/05

タイトル(英語): Progressive Access Control for JPEG 2000 Encoded Images

著者名: Ayman Haggag(Chiba University),Mohamed Ghoneim(Chiba University),呂建明 (Chiba University),谷萩隆嗣 (Chiba University)

著者名(英語): Ayman Haggag(Chiba University),Mohamed Ghoneim(Chiba University),Jianming Lu(Chiba University),Takashi Yahagi(Chiba University)

キーワード: JPEG 2000|Access Control

要約(日本語): In this paper we propose a progressive access control scheme specially designed for JPEG 2000 encoded images. Our scheme applies stream cipher to JPEG 2000 codestream in a way that it is possible to truncate the JPEG 2000 codestream and still be possible to decrypt the image to view it at a lower resolution or a quality level. We propose three implementations of our algorithm. Packet Based Access Control in which all packet bodies are encrypted using the same key and provides near optimum truncation. Resolution Based Access Control and Quality Based Access Control in which each resolution or quality layer is encrypted using a different key and provides controlled access to various resolutions or quality layers depending on the key given to the user. keys are dependant of each other. The key for a lower resolution or quality layer is the result of hashing the key of the higher resolution or quality layer. Our access control scheme preserves the inherent flexibility and accessibility of JPEG 2000 encoded images.

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