Coming Soon to DAOs: Permanent Shielded Voting via Homomorphic Encryption

Shutter announces that permanent Shielded Voting is on its development roadmap, aiming to keep individual DAO votes private before, during, and after the vote while anyone can still verify the result on-chain. The approach extends Shutter's existing threshold encryption to linearly homomorphic threshold ElGamal in the exponent, so encrypted votes can be tallied and only the final result decrypted by a threshold of Keypers. Zero-knowledge proofs verify that each vote is valid (Yes, No or Abstain) and that the tally was decrypted correctly. The post also lists limitations, including reliance on a threshold trust assumption and the cost of discrete logarithm recovery for large tallies.