Cryptology ePrint Archive: Report 1999/020
Improving the Exact Security of Digital Signature Schemes
Silvio Micali and Leonid Reyzin
Abstract: We provide two contributions to exact security analysis of
We put forward a new method of constructing Fiat-Shamir-like
signature schemes that yields better "exact security" than the original
Fiat-Shamir method; and
we extend exact security analysis to "exact cost-security analysis" by
showing that digital signature schemes with "loose security" may be
preferable for reasonable measures of cost.
Category / Keywords: digital signatures, ID schemes, random oracles, exact security.
Publication Info: Appeared in the THEORY OF CRYPTOGRAPHY LIBRARY and has been included in the ePrint Archive.
Date: received 27 August 1999, last revised 28 Feb 2006.
Contact author: reyzin at mit edu
Available formats: Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation
Note: This is a more complete version of the paper that appears in Journal of Cryptology, 15(1), 2002.
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