# Fiat-Shamir signature [closed]

I have a question about Fiat-Shamir signature:

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?

-

## migration rejected from security.stackexchange.comOct 28 '13 at 20:30

This question came from our site for Information security professionals. Votes, comments, and answers are locked due to the question being closed here, but it may be eligible for editing and reopening on the site where it originated.

## closed as unclear what you're asking by Paŭlo Ebermann♦Oct 28 '13 at 20:30

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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
Welcome to cryptography Stack Exchange. Your question was migrated here, because it is mainly about the theoretical parts of cryptography, not the application thereof (which would be on topic on Security Stack Exchange). Please register your account on both sites (using the same mail address) to take ownership of your question again, be able to edit, comment and accept an answer. –  Paŭlo Ebermann Nov 14 '12 at 19:12
Also, could you please indicate the source of your text included as an image? –  Paŭlo Ebermann Nov 14 '12 at 19:13