Method and apparatus for authenticating accreditations and for authenticating and signing messages
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United States of America Patent
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Aug 18, 1992
Issued Date -
N/A
app pub date -
Oct 9, 1991
filing date -
Sep 7, 1987
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for authentication of accreditations and of messages with zero-knowledge proof and for the signing of messages, and a station for use in such system, in particular executed as a smart card station. Instead of using multiple accreditations and an iterative process of verification, use is made of a comprehensve accreditation (high exponent p) and a number D is drawn at random, which number is within the range between 0 and p-1. The operations of verifiction proceed by the computation of the D-th power of the inverse accreditation B. Application in particular, to smart cards and, more specifically, to bank cards.
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