How does "Shamir's Secret Sharing" work to distribute secrets and prevent leaks?

The article explains Shamir’s Secret Sharing, where a secret is split into parts and can only be recovered when enough shares are combined.

Ente is using that idea for a new 2-of-3 account recovery feature called Legacy Kit in Ente Locker.

Legacy Kit is designed to make recovery safer by avoiding a single backup that could expose an entire account or encryption key.

The feature will be available on Android and iOS.