Selective video encryption of a distributed coded bitstream using LDPC codes

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Author

Hwayoung Um and Edward J. Delp

Entry type

conference

Abstract

Selective encryption is a technique that is used to minimizec omputational complexity or enable system functionality by only encrypting a portion of a compressed bitstream while still achieving reasonable security. For selective encryption to work, we need to rely not only on the beneficial effects of redundancy reduction, but also on the characteristics of the compression algorithm to concentrate important data representing the source in a relatively small fraction of the compressed bitstream. These important elements of the compressed data become candidates for selective encryption. In this paper, we combine encryption and distributed video source coding to consider the choices of which types of bits are most effective for selective encryption of a video sequence that has been compressed using a distributed source coding method based on LDPC codes. Instead of encrypting the entire video stream bit by bit, we encrypt only the highly sensitive bits. By combining the compression and encryption tasks and thus reducing the number of bits encrypted, we can achieve a reduction in system complexity.

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Date

2006

Editor

Edward J. Delp III and Ping Wah Wong

Journal

Security, Steganography, and Watermarking of Multimedia Contents VIII

Key alpha

um:60721B

Number

Pages

60721B

Publisher

SPIE

Volume

6072

Affiliation

Purdue University

Publication Date

2006-01-01

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@Conference{ um:60721B,
	title = "Selective video encryption of a distributed coded bitstream using LDPC codes",
	author = "Hwayoung Um and Edward J. Delp",
	year = "2006",
	editor = "Edward J. Delp III and Ping Wah Wong",
	journal = "Security, Steganography, and Watermarking of Multimedia Contents VIII",
	number = "1",
	pages = "60721B",
	publisher = "SPIE",
	volume = "6072",
	abstract = "Selective encryption is a technique that is used to minimizec omputational complexity or enable system functionality by only encrypting a portion of a compressed bitstream while still achieving reasonable security. For selective encryption to work, we need to rely not only on the beneficial effects of redundancy reduction, but also on the characteristics of the compression algorithm to concentrate important data representing the source in a relatively small fraction of the compressed bitstream. These important elements of the compressed data become candidates for selective encryption. In this paper, we combine encryption and distributed video source coding to consider the choices of which types of bits are most effective for selective encryption of a video sequence that has been compressed using a distributed source coding method based on LDPC codes. Instead of encrypting the entire video stream bit by bit, we encrypt only the highly sensitive bits. By combining the compression and encryption tasks and thus reducing the number of bits encrypted, we can achieve a reduction in system complexity.",
	affiliation = "Purdue University",
}