Wallet: Trezor — security glitches reveal private keys

FWIW, upgrade your Trezor and should be all set.

“Important: Firmware 1.5.2 fixes all known attack vectors — even those addressed in the two misleading articles, posted under a pseudonym.”

https://blog.trezor.io/fixing-physical-memory-access-issue-in-trezor-2b9b46bb4522

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If the passphrase option is enabled, any attacker would need to know the additional word of the user-provided seed phrase to succeed.

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