NDLI: Capacity Limits of Pseudorandom Channels in Deception Problems

Content Provider	IEEE Xplore Digital Library
Author	Enping Li Craver, S. Jun Yu
Copyright Year	2005
Abstract	Supraliminal channels were introduced in 1998 as a means to achieve public key exchange in the presence of an active warden. These channels have content visible to all principals-their content is not concealed or protected by a secret key-but are highly robust to an active warden. It is assumed that this high robustness allows the transmission of key exchange datagrams. In this paper, we provide a theoretical model for supraliminal channels as channels of random data with a constraint on their distribution. We present a surprising result that in such a model, vanishingly small tampering can indefinitely derail key exchange. Unlike traditional communication theory, the specific constraints of steganographic channels prevent the use of redundancy to achieve more reliable transmission, and can even make communication more fragile to an active adversary. This result requires a vigilant adversary, however, and we propose a protocol to increase the probability of successful key exchange in the event of a pause in the warden's tampering.
Sponsorship	IEEE Signal Processing Society
Starting Page	1824
Ending Page	1834
Page Count	11
File Size	2368839
File Format	PDF
ISSN	15566013
Volume Number	10
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Noise Animation Protocols Generators Approximation methods Robustness MIMICs coin flip channels Covert communication public key exchange supralminal channels supraliminal channels
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Safety, Risk, Reliability and Quality

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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