[Resource Topic] 2017/349: LMS vs XMSS: Comparion of two Hash-Based Signature Standards

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Title:
LMS vs XMSS: Comparion of two Hash-Based Signature Standards

Authors: Panos Kampanakis, Scott Fluhrer

Abstract:

Quantum computing poses challenges to public key signatures as we know them today. LMS and XMSS are two hash based signature schemes that have been proposed in the IETF as quantum secure. Both schemes are based on well-studied hash trees, but their similarities and differences have not yet been discussed. In this work, we attempt to compare the two standards. We compare their security assumptions and quantify their signature and public key sizes. We also address the computation overhead they introduce. Our goal is to provide a clear understanding of the schemes’ similarities and differences for implementers and protocol designers to be able to make a decision as to which standard to chose.

ePrint: https://eprint.iacr.org/2017/349

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