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- W34964205 abstract "G.J. Simmons has advanced the concept of using authentication in an open channel to actually convey information. We review the use of the knapsack problem for public codes and explore the use of Shamir's method for a signature only knapsack to convey messages. Disciplines Physical Sciences and Mathematics Publication Details Seberry, J, A subliminal channel in codes for authentication without secrecy, Ars Combinatoria, 19A, 1985, 37-41. This journal article is available at Research Online: http://ro.uow.edu.au/infopapers/1018 A SUBLIMINAL CHANNEL IN CODES FOR AUTHENTICATION WITHOUT SECRECY Jennifer Seberry* Department of Computer Science University of Sydney N.S.W. 2006 Abstract G.J. Simmons has advanced the concept of using authentication in an open channel to actually convey information. We review the use of the knapsack problem for public codes and explore the use of Shamir's method for a signature only knapsack to convey messages.G.J. Simmons has advanced the concept of using authentication in an open channel to actually convey information. We review the use of the knapsack problem for public codes and explore the use of Shamir's method for a signature only knapsack to convey messages. Introduction Simmons describes subverting authentication to carry secret information when the message-signature pair (M, C) is transported by a neutral or hostile medium on an open channel. Simmons describes how a warden might pennit a trustee (or say the Red Cross) to carry an open communication between X and Y in the hope that he can deceive at least one into accepting as a genuine communication (a) a fraudulent message created by the warden, or (b) a modification of a genuine message. X and Y accept the use of an open channel and a potentially hostile transporter in order to have any communication at all but insist on a signature or authentication attached to the communication. The model can be described by the following diagram. Initiator , Receiver sends checks message OPEN CHANNEL signature (data link, telephone, telex, with signature trustee, third person) given public key As Simmons notes, there can be many valid signatures for one message, and if the signature space can be partitioned. information can be conveyed by the choice of signature. *This research was supported by grants from the ACRB and the ARGS. ARS COMBINATORIA, Vol. 19A (1985), pp.37-41 MeSSage~'~=====: -:.~~~" @default.
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- W34964205 date "1985-01-01" @default.
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- W34964205 title "A subliminal channel in codes for authentication without secrecy" @default.
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