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Proceedings Paper

Efficient secure image transmission: compression integrated with encryption
Author(s): Paul Salama; Brian King
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Paper Abstract

Due to the ease with which digital data can be manipulated and due to the ongoing advancements that have brought us closer to pervasive computing, the secure delivery of video and images has become a challenging problem. Despite the advantages and opportunities that digital video provide, yet, the illegal copying and distribution as well as plagiarism of digital audio, images, and video is still ongoing. In this paper we describe a technique for securing digital images based on combining image compression and encryption. The underlying idea in this is to combine encryption with rate scalable image compression such as EZW or SPIHT. EZW or SPIHT compresses image in such a way that the present coding state of a wavelet coefficient is dependent on the current coding of the coefficient’s parent and on prior coding states of the coefficient and its parent. A consequence of this within a bit stream of length N is that if we obscure the first M leading bits of the bit stream and leave the remaining N-M bits unchanged then the trailing N-M bits reveal “very little information” about the original image. Thus, by exploiting this inter-data dependency we can selectively encrypt part of the data stream and hence, reduce the computational burden and bandwidth requirement for transmitting images securely.

Paper Details

Date Published: 21 March 2005
PDF: 12 pages
Proc. SPIE 5681, Security, Steganography, and Watermarking of Multimedia Contents VII, (21 March 2005); doi: 10.1117/12.587011
Show Author Affiliations
Paul Salama, Indiana Univ./Purdue Univ. at Indianapolis (United States)
Brian King, Indiana Univ./Purdue Univ. at Indianapolis (United States)

Published in SPIE Proceedings Vol. 5681:
Security, Steganography, and Watermarking of Multimedia Contents VII
Edward J. Delp III; Ping W. Wong, Editor(s)

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