So I spent the last few weeks digging into the Coldcard RNG bug on-chain, and the numbers came out worse than what has been reported so far. Background for anyone who missed it: a batch of firmware shipped with the hardware RNG switched off for seed generation (the MICROPY_HW_ENABLE_RNG=0 thing). So instead of the real TRNG, seeds were coming out of a small software PRNG, and the actual entropy was only around 19 to 20 bits. That is crackable on a single GPU. I brute-forced the affected seeds u
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