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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