COLDCARD RNG incident the public record, collected and explained
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Question about the good generator's seeding

supertestnet-2085449733083218014

https://x.com/supertestnet/status/2085449733083218014

Captured screenshot of the post by @supertestnet, posted 6 Aug 2026, 19:35 UTC
@supertestnet posted captured full-size capture → original post →
Author
@supertestnet
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independent
Evidence role
social statement
Posted
Capture status
capture held

Super Testnet observes that the device had two random number generators, notes that the bad one was seeded with keypresses, a timestamp and the device id, says that is roughly how he would have seeded it himself, and asks what the good one was seeded with. The question turns the discussion from the failure of the weak path to what made the intended path adequate. The record holds the relevant primary material: libngu random.c at libngu-random-c, and Coinkite's account at coldcardwallet-2085541034243600805 that seed generation was meant to use the hardware TRNG alone. The characterisation of the two generators is the poster's own and is not verified here.

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

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