[Resource Topic] 2017/953: Threshold Kleptographic Attacks on Discrete Logarithm Based Signatures

Welcome to the resource topic for 2017/953

Title:
Threshold Kleptographic Attacks on Discrete Logarithm Based Signatures

Authors: George Teseleanu

Abstract:

In an \ell out of n threshold scheme, \ell out of n members must cooperate to recover a secret. A kleptographic attack is a backdoor which can be implemented in an algorithm and further used to retrieve a user’s secret key. We combine the notions of threshold scheme and kleptographic attack to construct the first \ell out of n threshold kleptographic attack on discrete logarithm based digital signatures and prove its security in the standard and random oracle models.

ePrint: https://eprint.iacr.org/2017/953

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