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LINKS FOR ADDITIONAL READING FOR THIS VIDEO & ALL INFO IN TEXT DOWN BELOW:

Blog Detailing the Extraktor: https://ledger-donjon.github.io//Unfixable-Key-Extraction-Attack-on-Trezor/

How to Add Passphrase on Trezor: https://blog.trezor.io/seed-pin-passphrase-e15d14a0b546

Video on multi-passphrase on Trezor here: https://www.youtube.com/watch?v=212NH5xfVrc

How to Add Passphrase on KeepKey: https://blog.cryptocoin.cc/2019/05/26/guide-how-to-enable-and-a-bip39-passphrase-with-keepkey-to-increase-your-security/

Restoring KeepKey: https://www.reddit.com/r/keepkey/comments/5mmmhe/using_passphrase_with_keepkey/

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