Trezor Now Accepts 128-Character Passphrases, Pointing to Coldcard’s Seed Flaw

Trezor, a hardware wallet maker, released a Nov. 1 firmware update enabling passphrases up to 128 characters across most of its devices, and notably opened its announcement by highlighting a seed-related flaw in competitor Coldcard. The move signals intensifying competition in the self-custody hardware wallet market, where security features are a key differentiator. Trezor's expanded passphrase support gives users greater flexibility in creating custom security layers for their wallets. The company's decision to lead with a rival's vulnerability marks an unusually direct competitive jab in the typically low-profile hardware wallet sector. Investors and users should watch for Coldcard's response and whether the seed flaw prompts a broader security review across hardware wallet makers.