Accession Number : ADA465120


Title :   Capacity is the Wrong Paradigm


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR HIGH ASSURANCE COMPUTING SYSTEMS (CHACS)


Personal Author(s) : Moskowitz, Ira S ; Chang, LiWu ; Newman, Richard E


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a465120.pdf


Report Date : Jan 2002


Pagination or Media Count : 14


Abstract : At present, capacity is the prevailing paradigm for covert channels. With respect to steganography, however, capacity is at best insufficient, and at worst, is incorrect. In this paper, we propose a new paradigm called capability which gauges the effectiveness of a steganographic method. It includes payload carrying ability, detectability, and robustness components. We also discuss the use of zero-error capacity for channel analysis and demonstrate that a JPEG compressed image always has the potential to carry hidden information.


Descriptors :   *CRYPTOGRAPHY , *STEGANOGRAPHY , INFORMATION EXCHANGE , COVERT OPERATIONS , MESSAGE PROCESSING , TEXT PROCESSING


Subject Categories : Cybernetics


Distribution Statement : APPROVED FOR PUBLIC RELEASE