Trezor said in an official announcement that it has increased the maximum length for optional wallet passphrases from 50 characters to 128 characters. The change requires users to update their device firmware, while older firmware versions remain capped at 50 characters. The company described a passphrase as an optional secret added on top of a wallet backup, noting that different passphrases lead to separate wallets. Trezor also pointed to a firmware flaw that affected some Coldcard devices in July, saying strong and unique passphrases helped some impacted users protect their assets and bought them time to move funds.
Trezor said in an official announcement that it has raised the maximum length for optional wallet passphrases from 50 characters to 128 characters.
Users need to update their device firmware to use the higher limit. Older firmware versions are still restricted to 50 characters.
The company said a passphrase is an optional secret added beyond a wallet backup, and different passphrases correspond to separate wallets.
Trezor also cited a firmware flaw that affected some Coldcard devices in July, saying strong and unique passphrases helped some affected users protect their assets and gave them time to move funds.
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