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arXiv · 2002.07419

Security analysis of the W-OTS$^+$ signature scheme: Updating security bounds

M. A. Kudinov·E. O. Kiktenko·A. K. Fedorov
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Abstract

In this work, we discuss in detail a flaw in the original security proof of the W-OTS${^+}$ variant of the Winternitz one-time signature scheme, which is an important component for various stateless and stateful many-time hash-based digital signature schemes. We update the security proof for the W-OTS${^+}$ scheme and derive the corresponding security level. Our result is of importance for the security analysis of hash-based digital signature schemes.

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M. A. Kudinov, E. O. Kiktenko, A. K. Fedorov. 2020-02-18. Security analysis of the W-OTS$^+$ signature scheme: Updating security bounds. https://doi.org/10.4213/mvk362

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