As of: 2026-10-17 22:10 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/p/2026-10-16-hdevalence-nist-curve-seeds-timestamps/

# Henry de Valence (Anthropic team): 'Turns out to have been timestamps!'

Henry de Valence (@hdevalence), X, 2026-10-16.
Source: https://x.com/hdevalence/status/2111170616112132273

## Why it matters

First-hand post (~79k views) by a member of the team behind Anthropic's NIST curve-seed result.

## Summary

Posted Fri Oct 16 19:01:13 +0000 2026 by Henry de Valence (@hdevalence); 79,124 views, 526 likes, 33 reposts when read via api.fxtwitter.com on 2026-10-17. 'Claude figured out the origin of the NIST curve parameters. Turns out to have been timestamps!' with a link to anthropic.com/research/ecdsa-curve-origins and an image.

## Archived text

> Claude figured out the origin of the NIST curve parameters. Turns out to have been timestamps!
> 
> https://www.anthropic.com/research/ecdsa-curve-origins

Archived 2026-10-17 via fxtwitter (unofficial).
Counts: 81,189 views, 531 likes, 33 reposts, 32 replies (at fetch time)
Media: https://pbs.twimg.com/media/HUxifDRaUAEJiHr.jpg?name=orig

## Cited in

- 2026-10-16: [Claude explains where the NIST P-256 curve seeds came from](https://postcutoff.com/e/2026-10-16-claude-recovers-nist-ecdsa-curve-seeds/)