Welcome to the resource topic for 2021/566
Title:
From Random Oracles to Ideal Signatures, and Back
Authors: Cong Zhang, Hong-Sheng Zhou
Abstract:We investigate the digital signature schemes in the indifferentiability framework. We show that the well-known Lamport one-time signature scheme and the tree-based signature scheme can be ``lifted’’ to realize ideal one-time signature, and ideal signature, respectively, without using computational assumptions. We for the first time show that the ideal signatures, ideal one-time signatures, and random oracles are equivalent in the framework of indifferentiability.
ePrint: https://eprint.iacr.org/2021/566
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