Shamir secret sharing splits a seed phrase into multiple shares where M-of-N shares are required for reconstruction. This reduces single-location backup failure risk.
Shares must be stored with geographic and custodial separation. Concentrating multiple shares in one location defeats the purpose of splitting.
Reconstruction requires careful handling in a private, offline environment. Document share locations and threshold requirements for continuity officers without exposing share content.
Lost shares below the reconstruction threshold result in permanent access loss; Shamir schemes add operational complexity that must be managed deliberately.