r/CryptoAnarchy

How do you divide up a secret between a group of people such that no one person can reconstruct it, no two people can reconstruct it, but any group of three can? (In real life, more likely it will be servers, rather than people.) The answer uses mathematics that is entirely accessible to a good high school student… except for a little twist at the end, where you need some knowledge of number theory.

Read the full post (for free) on Substack: Polynomials and Secret Sharing.