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Volker | 3 months ago (raw) | root | parent | reply | flag 
 It stores them temporarily, and could exfiltrate them to the mempool or blockchain when used.
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noerms | 3 months ago (raw) | root | parent | reply | flag +1 
 Same with passphrases?
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Volker | 3 months ago (raw) | root | parent | reply | flag 
 In principle, yes. If you can exfiltrate any sequence of bits (eg a seed phrase), you can exfiltrate whatever you want (eg a BIP39 passphrase). But it may be impractical, and I don't know if there are actual exploits.