Trezor raises the wallet passphrase limit to 128 characters

Trezor has raised the maximum length of its optional wallet passphrase from 50 to 128 characters, according to an official announcement on November 2, with users required to update their device firmware to access the longer limit, as older firmware remains capped at 50 characters. Passphrases serve as optional secret additions layered on top of a wallet's backup, with each distinct phrase generating an independent wallet. The hardware wallet maker cited a July firmware flaw affecting some Coldcard devices, noting that strong, unique passphrases helped some affected users protect their assets and buy time to move funds. The change underscores growing emphasis on passphrase security across the hardware wallet sector following the Coldcard incident. Watch for firmware adoption rates among Trezor users and whether competing hardware wallet makers follow with similar passphrase enhancements.