Terence gives a solid explanation on what happened with ColdCard. SEED A (full): ocean tiger silver dance pigeon melody crystal rocket amber jungle violin sunset SEED B (weak): garden mirror silent canyon river melody crystal rocket amber jungle violin sunset Look the same. Can’t tell by eye. 40 bits ≈ 1.1T possibilities → brute-forceable. The fix: Roll your own words. Add passphrase. Multisig. Never trust device RNG alone. Read the entire post for full details.
Jeff SwansonShare
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