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Proceedings Paper

Fast encryption methods for audiovisual data confidentiality
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Paper Abstract

Two methodologies for efficient audiovisual data encryption are studied in this research, i.e. selective encryption and MHT (multiple-Huffman-table). We first discuss benefits and limitations of selective encryption, and propose a selective encryption scheme for ITU G.723.1 speech coding. A review of all cryptanalysis work of selective encryption algorithms in the literature is given, our cryptanalysis for the JPEG/MPEG sign-bit encryption scheme is presented, and two rules to determine whether selective encryption for a compression system is suitable are concluded. Then, we investigate another encryption methodology via the manipulation of Huffman coding tables of multimedia coding systems. The MHT scheme chooses several different Huffman tables from a vast number of possible candidates, and uses them alternatively to encode multimedia data. The choice of Huffman tables and the order that they are used are kept secret as the key. This method requires very little computational overhead, and can be applied to the encryption of MPEG audio, MPEG video and JPEG/JPEG2000 images.

Paper Details

Date Published: 22 March 2001
PDF: 12 pages
Proc. SPIE 4209, Multimedia Systems and Applications III, (22 March 2001); doi: 10.1117/12.420829
Show Author Affiliations
Chung-Ping Wu, Univ. of Southern California (United States)
C.-C. Jay Kuo, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 4209:
Multimedia Systems and Applications III
Andrew G. Tescher; Bhaskaran Vasudev; V. Michael Bove Jr., Editor(s)

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