OpenAI researcher: hashing an adversary-chosen timestamp doesn't stop rigging

csvoss · x · 2026-10-17

OpenAI researcher Catherine Olsson (@csvoss) pushes back on an ECDSA timestamp post: applying a deterministic or hashing function to an adversary-chosen timestamp does not remove the adversary's room to rig the result — there are plenty of bits of wiggle room depending on the situation.

She understands the original wording was meant to avoid alarming people and that for these particular seeds it is probably fine, but argues that "just hash it" is simply not a valid argument.

The linked GitHub issue (jeffkaufman/nomic #100) provides context: the author wrote a timing attack, then found that GitHub signs merge-button commits, and pasted a commit object with a gpgsig — noting @csvoss appears to have avoided this.

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