In order to achieve true transaction privacy, it is not enough to encrypt or build ZK proofs for transaction bundles, as long as the underlying blockchain uses an account-based model. Aztec is building a ZKVM that superposes an UTXO model, so that balances are constantly updated as new, untraceable, log entries. The upcoming Aztec 3 aims to enable privacy-preserving smart contracts, using a hybrid, multi-layered rollup. This approach allows for both public and private smart contracts to be executed simultaneously.

We were joined by Zac Williamson & Joe Andrews, to discuss the evolution of Aztec, from ZK Money to their upcoming privacy-preserving hybrid ZK rollup.

Topics covered in this episode:

• The evolution of Aztec, from ZK money to Aztec 3
• How Aztec’s ZKVM ensures privacy for Ethereum transactions
• The need for UTXO model for privacy-preserving encrypted databases
• Interacting with public smart contracts in a private manner
• Technical roadmap and challenges faced along the way
• How Aztec differs from Mina protocol
• Recursive proofs
• Estimating gas
• Main-net sequencer decentralisation
• Goblin Plonk
• The future of programmable privacy

Episode links:

• Zac Williamson on Twitter
• Joe Andrews on Twitter
• Aztec on Twitter

This episode is hosted by Felix Lutsch. Show notes and listening options: epicenter.tv/499