Subject: RE: [Cfrg] Defining inter operable ECC keys in for IETF protocols (fwd)

From: Yvonne Cliff <[email-masked]>
Date: Thu, 23 Mar 2006 11:52:24 +1000 (EST)

On Wed, 22 Mar 2006, Hallam-Baker, Phillip wrote:

> The key size is still large (does someone know how large a key has to be to
> give 2^128 equivalent security). But the signatures are small, 256 bits,

Have you read the following paper?

Selecting Cryptographic Key Sizes,
PKC 2000, Journal of Cryptology 14 (2001), 255-293
http://www.win.tue.nl/~klenstra/

Regards,
Yvonne
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Dr. Yvonne Cliff
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Information Security Institute
Queensland University of Technology
126 Margaret Street
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CRICOS No 00213J
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