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I have a question about Fiat-Shamir signature:

Scheme

A hash function is h(w)=w mod 2011 and w1=2623, w2=3269, w3=1938.

What is h=? and how to determine k.t bits?

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No, you are supposed to use a cryptographic hash function. $h(w) = w \bmod 2011$ is not a cryptographically strong hash function; it's not suitable for use with Fiat-Shamir signatures. – D.W. Nov 14 '12 at 3:31
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Also, could you please indicate the source of your text included as an image? – Paŭlo Ebermann♦ Nov 14 '12 at 19:13

migrated from security.stackexchange.com Nov 13 '12 at 22:44

1 Answer

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I think you need to find a better reference on Fiat-Shamir signatures, and in particular, one that will give you more detail.

One good reference is Chapter 11.4 of The Handbook of Applied Cryptography, but there are probably many others.

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