RFC 9591

The Flexible Round-Optimized Schnorr Threshold (FROST) Protocol for Two-Round Schnorr Signatures, June 2024

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Also available: XML file for editing
 
Status:
INFORMATIONAL
Authors:
D. Connolly
C. Komlo
I. Goldberg
C. A. Wood
Stream:
IRTF

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC9591

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Abstract

This document specifies the Flexible Round-Optimized Schnorr Threshold (FROST) signing protocol. FROST signatures can be issued after a threshold number of entities cooperate to compute a signature, allowing for improved distribution of trust and redundancy with respect to a secret key. FROST depends only on a prime-order group and cryptographic hash function. This document specifies a number of ciphersuites to instantiate FROST using different prime-order groups and hash functions. This document is a product of the Crypto Forum Research Group (CFRG) in the IRTF.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.




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