# Trezor ## [[Trezor]] wallet implements [[Shamir Secret Sharing]], but it's based on [[SLIP 39]] - Landing page: https://trezor.io/shamir/ - Blog post: https://blog.trezor.io/shamir-backup-the-revolution-of-private-keys-backup-is-here-858687ed7fe7 - "The Trezor Model T is the first and only hardware wallet in the world to implement the fully functional [[SLIP 39]] security standard: Shamir Backup." - "[[SatoshiLabs]] continues to push the boundaries of security by creating new industry standards like Shamir Backup, making it possible for you to find the best security solution for your needs. By maintaining our open-source philosophy, we are making it possible for other security companies to join the revolution. We believe that Shamir Backup will eventually be adopted by the rest of the industry and further increase the security standards of hardware wallets." - Another blog post Feb 26 2021: https://blog.trezor.io/multisig-and-split-backups-two-ways-to-make-your-bitcoin-more-secure-7174ba78ce45 - Page in Trezor wiki: https://wiki.trezor.io/Shamir_Backup ### Detailed Guide to Shamir Backup https://blog.trezor.io/https-blog-trezor-io-dev-corner-shamir-backup-guide-5f9957ff1008 - "At first glance you will notice that Shamir recovery shares are longer than BIP-0039 recovery seeds. For 128-bit security each recovery share is 20 words in length, and for 256-bit security each is 33 words in length." ## Is inferior to [[Ledger]] because passphrases are typed in using the computer keyboard, which is vulnerable to keylogging - Source: [Coinmonks](https://medium.com/coinmonks/ledger-vs-trezor-best-hardware-wallet-to-secure-cryptocurrency-22c7a3fd391e#:~:text=In%20Trezor%20wallets%2C%20this%20password,entered%20using%20the%20normal%20keys.) - [[Gloria Zhao]] noted however that the keyboard is randomized when typing, so yeah that's fine actually