RFC 9496

The ristretto255 and decaf448 Groups, December 2023

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Status:
INFORMATIONAL
Authors:
H. de Valence
J. Grigg
M. Hamburg
I. Lovecruft
G. Tankersley
F. Valsorda
Stream:
IRTF

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC9496

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Abstract

This memo specifies two prime-order groups, ristretto255 and decaf448, suitable for safely implementing higher-level and complex cryptographic protocols. The ristretto255 group can be implemented using Curve25519, allowing existing Curve25519 implementations to be reused and extended to provide a prime-order group. Likewise, the decaf448 group can be implemented using edwards448.

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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