# Annex G The comparison table now includes EdDSA

Annex G compares the certificate-based elliptic curve mechanisms, and the amendment updates it so that EdDSA is in the comparison. The table is the one a design note cites when it chooses a mechanism on size or computation, so an unchanged table is a stale citation.

## What it asks

Replace any comparison table copied from an earlier edition, and record the criteria your choice actually used. Where the choice was made on signature size, key size or computation, cite the table row and the edition, and note that the comparison is informative rather than a requirement.

## What the amendment does

Updates Annex G.

## Who it binds

The architect who chose the mechanism and the author of the design note.

## Evidence an auditor samples

- The design note, with the comparison row and the edition it cites (architecture)
- The benchmark or measurement behind any performance claim (test report)
- The review that accepted the choice (risk register)

## The test you can run

Open the design note and the table side by side. If the note cites a row that does not exist in the current edition, the citation is stale.

## Common failures

- The note cites a comparison from a vendor deck rather than the standard.
- A performance claim is repeated without a measurement.

## How to close it

A comparison informs a choice; it does not make it. Record the criteria, the measurement and the date, and cite the table as informative so that a later reader knows which part is requirement and which part is guidance.

## Source

ISO/IEC 14888-3:2018/FDAM 1:2026(en), draft, Annex G. Read on 21 October 2026. Our wording, not the instrument's.
https://www.iso.org/standard/89517.html

Not legal advice; does not certify.