Trezor Raises Wallet Passphrase Limit to 128 Characters
Trezor has increased the maximum length of optional wallet passphrases from 50 to 128 characters, following the July Coldcard attacks where strong passphrases helped protect some users from wallet theft. The update, available in the Trezor Suite with updated device firmware, allows for more complex and secure passphrases.
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Trezor cited the Coldcard attacks, where a firmware flaw led to some devices generating recovery phrases with insufficient randomness, allowing attackers to reconstruct them. Strong, unique passphrases protected some affected users.
A separate incident involved Trezor's own devices. The company advised customers who bought wallets from a former authorized reseller to move their funds to new wallets, following a report of a potential implant in a Trezor Safe 5 that could capture on-screen information, including recovery phrases.
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