How many transactions would it take to hack a 24 word seed phrase?
Would a passphrase offer protection?
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Replies (2)
See FAQ: 
24 words needs twice as many signatures as 12. 24 words with strong passphrase needs twice as many as 24 words without one.
Dark Skippy - FAQ
A powerful method for a malicious hardware wallet to leak its secret keys.
or use a wallet descriptor like core does