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Criticism of Nunchuk platform-key disclosure timing

csbastiat-nunchuk-criticism

https://x.com/CSBastiat/status/2083242346020323447

Captured screenshot of the post by @CSBastiat, posted 31 Jul 2026, 17:24 UTC
@CSBastiat posted captured full-size capture → original post →
Author
@CSBastiat
Organisation
independent
Evidence role
commentary
Posted
Capture status
capture held

States, in strong terms, that Nunchuk should have disclosed sooner that its platform keys were generated with Coldcards, arguing every Nunchuk multisig user unknowingly held an extra Coldcard-generated key. Held as attributed community criticism of a provider's disclosure timing. The attached image (archived as an attachment, never displayed) is a crop of a Nunchuk statement headed "How this affects Nunchuk platform keys": some platform keys were generated with a Coldcard Mk4, custom derivation logic means the seeds are not used directly, and Nunchuk assumes an attacker's lookup table would eventually include the derived keys. Which channel the crop came from (the subscriber email or a notice page) is unconfirmed.

This post is registered as evidence and has a locally held capture. The original remains the canonical publication.

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