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Security analysis of the W-OTS$^+$ signature scheme: Updating security bounds
February 18, 2020 Β· Declared Dead Β· π Matematicheskie Voprosy Kriptografii [Mathematical Aspects of Cryptography]
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Authors
M. A. Kudinov, E. O. Kiktenko, A. K. Fedorov
arXiv ID
2002.07419
Category
cs.CR: Cryptography & Security
Citations
15
Venue
Matematicheskie Voprosy Kriptografii [Mathematical Aspects of Cryptography]
Last Checked
4 months ago
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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