2008 Reports : Cryptology ePrint Archive Forum

Discussion forum for Cryptology ePrint Archive reports posted in 2008.
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a question about "secure index paper" bye GOH

Posted by: **fatima** (IP Logged)

Date: 05 July 2008 06:13

I want a question about its security proof. What does "q" mean when we want to prove a method is (t,e,q)-secure.

and in the theorem 3.2 in this paper GOH has PROVE that if f is a (t, e, q)-psedo-random function, then z-idx is a (t, e, q/2)-IND_CKA index. How can we calculate q/2 ?

why is it q/2 ? Why is not is q ?

and in the theorem 3.2 in this paper GOH has PROVE that if f is a (t, e, q)-psedo-random function, then z-idx is a (t, e, q/2)-IND_CKA index. How can we calculate q/2 ?

why is it q/2 ? Why is not is q ?

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