Practical Human-Machine Identification over Insecure Channels

Xiang-Yang Li () and Shang-Hua Teng ()
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Xiang-Yang Li: University of Illinois at Urbana-Champaign
Shang-Hua Teng: University of Illinois at Urbana-Champaign

Journal of Combinatorial Optimization, 1999, vol. 3, issue 4, No 1, 347-361

Abstract: Abstract Human-machine identification is an important problem in cryptography that has applications in network access, electronic commerce, and smart-card design. It is a hard problem largely because human users have a very limited capacity in memorizing secrets and in performing protocols. Therefore, in addition to the requirement that a human-machine identification scheme must be provably secure, the scheme has to be practical in the sense that it must be feasible for a human user to participate. In this paper, we develop a new scheme for this problem. Our scheme improves upon some of the previously proposed human-machine identification schemes. We present a vigorous security analysis of our scheme. We also present some attacks to show previously proposed schemes could be vulnerable.

Keywords: cryptography; human-machine identification; network security (search for similar items in EconPapers)
Date: 1999
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DOI: 10.1023/A:1009894418895

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