Jun 11, 2026Updated: Jun 11, 2026

Excalidraw Keyshare Materials

Memo

#excalidraw#mpc#cryptography

Updated Excalidraw materials for explaining MPC private key share lifecycle: split, reshare, and combine/recovery.

• Download the importable Excalidraw source
• Split PNG
• Reshare PNG
• Combine PNG

Split

A private key is split into a 2-of-3 threshold set of shares. No single share is the private key.

Reshare

Existing shares can participate in a resharing protocol to create a new share distribution. The underlying private key stays the same.

Combine

A valid threshold number of new shares can combine to recover the original private key. This is a recovery/combine operation, not the normal signing path.