Selecting Cryptographic Key Sizes |
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| Authors: | Arjen K Lenstra Eric R Verheul |
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| Affiliation: | (1) Citibank, N.A., 1 North Gate Road, Mendham, NJ 07945-3104, U.S.A. arjen.lenstra@citicorp.com and Technische Universiteit Eindhoven, US;(2) PricewaterhouseCoopers, GRMS Crypto Group, Goudsbloemstraat 14, 5644 KE Eindhoven, The Netherlands eric.verheul@[nl.pwcglobal.com, pobox.com], NL |
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| Abstract: | In this article we offer guidelines for the determination of key sizes for symmetric cryptosystems, RSA, and discrete logarithm-based
cryptosystems both over finite fields and over groups of elliptic curves over prime fields. Our recommendations are based
on a set of explicitly formulated parameter settings, combined with existing data points about the cryptosystems.
Received September 1999 and revised February 2001 Online publication 14 August 2001 |
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| Keywords: | , Symmetric key length, Public key length, RSA, ElGamal, Elliptic curve cryptography, Moore's law, |
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