Cryptology ePrint Archive: Report 2003/009

Domain Extenders for UOWHF: A Finite Binary Tree Algorithm

Palash Sarkar

Abstract: We obtain a {\em finite} binary tree algorithm to extend the domain of a UOWHF. The associated key length expansion is only a constant number of bits more than the minimum possible. Our finite binary tree algorithm is a practical parallel algorithm to securely extend the domain of a UOWHF. Also the speed-up obtained by our algorithm is approximately proportional to the number of processors.

Category / Keywords: UOWHF, hash function, binary tree

Date: received 20 Jan 2003, last revised 16 Feb 2004

Contact author: palash at isical ac in

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Version: 20040216:090403 (All versions of this report)

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