"This is a tool that #encrypts files and splits the decryption key among trusted friends using Shamir's Secret Sharing. For example, you can give pieces to 5 friends and require any 3 of them to cooperate to recover the key. No single friend can access your data alone.
Each friend receives a self-contained bundle with recover.html—a browser-based tool that works offline, with no servers or internet required. If this website disappears, recovery still works."
