Trezor Now Accepts 128-Character Passphrases, Pointing to Coldcard’s Seed Flaw
By Unchained
AI summary of the source article
Trezor has increased its passphrase limit from 50 to 128 characters for most of its hardware wallets following thefts linked to a Coldcard seed flaw. The update applies to Model T, Safe 3, Safe 5, and Safe 7 devices.
Why it matters
Trezor stated that "an attacker needed both the weak backup and the passphrase to reach their wallet" and that users "with a strong, unique passphrase were protected."
Key facts
- Trezor expanded the passphrase cap from 50 to 128 characters for the Model T, Safe 3, Safe 5, and Safe 7.
- The change follows Coldcard thefts where a firmware flaw compromised seed randomness, leaving passphrases as the remaining layer of protection.
- Galaxy Research estimated about 1,596 BTC, worth over $100 million, was stolen from roughly 7,300 addresses affected by the Coldcard flaw.
Source excerpt · Unchained
Trezor's Nov. 1 update lets most of its hardware wallets take passphrases up to 128 characters, and the company opened the announcement with the Coldcard seed failure. The post Trezor Now Accepts 128-Character Passphrases, Pointing to Coldcard’s Seed Flaw appeared first on Unchained .