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RFC 8032, "Edwards-Curve Digital Signature Algorithm (EdDSA)", January 2017

Source of RFC: IRTF

Errata ID: 5759
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Franck Rondepierre
Date Reported: 2019-06-21
Held for Document Update by: Stanislav Smyshlyaev
Date Held: 2022-02-15

Section 5.2. says: 

                          (p+1)/4    3            (p-3)/4
                 x = (u/v)        = u  v (u^5 v^3)         (mod p)

It should say:

                          (p+1)/4            (p-3)/4
                 x = (u/v)        =  u (u v)         (mod p)

Notes:

--VERIFIER NOTES--
The original text was correct (verified by Nick Sullivan).
01/28/2022: RFC Editor changed status to Reported per discussion with Stanislav V. Smyshlyaev.
02/15/2022: The status is changed to "Held for Document Update" by Stanislav Smyshlyaev. The proposed formulas are correct as well (for the specific case of the EdDSA parameters) and provide a slight efficiency gain.

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