Feature request: share master password via Shamir Secret Sharing

robertgreenford

The problem:

• paper backups of the master password/secret key are prone to being stolen, lost or destroyed. There needs to be a better way to safeguard these backups.
• Passing on your master password after you passed away requires actually handing it to someone else while you're alive. This presents obvious security issues. (prior discussion)

A naive solution is to split your password in several pieces and hand the pieces to trusted people. But if one of the pieces were to be compromised, your master password could be easily brute-forced.

This could be solved by sharing the master password via Shamir's Secret Sharing Scheme, whereby the master password can be reconstructed only when a predetermined number of pieces are combined together.

This has been implemented successfully in some hardware cryptocurrency wallets:
https://blog.trezor.io/https-blog-trezor-io-dev-corner-shamir-backup-guide-5f9957ff1008

Could we have something similar in 1password?

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Referrer: forum-search:Samir Secret Sharing for 1password

[Deleted User]

@robertgreenford This has come up a few times before. The following threads include responses from jpgoldberg:

https://1password.community/discussion/comment/524069#Comment_524069

https://1password.community/discussion/comment/303221#Comment_303221

Lars

@robertgreenford - thanks for the question and the ideas. As missingbits points out, this has been raised a few times in the past - the links given are good places to look. Long story short, we don't have anything to announce on this front at this time. In the meantime, some people have addressed the Secret Key issue by locating a hard copy in a safety deposit box or with a trusted attorney, both traditional avenues for securing important documents.