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 3How Aztec’s ZKVM ensures privacy for Ethereum transactionsThe need for UTXO model for privacy-preserving encrypted databasesInteracting with public smart contracts in a private mannerTechnical roadmap and challenges faced along the wayHow Aztec differs from Mina protocolRecursive proofsEstimating gasMain-net sequencer decentralisationGoblin PlonkThe future of programmable privacyEpisode links:Zac Williamson on TwitterJoe Andrews on TwitterAztec on TwitterThis episode is hosted by Felix Lutsch. Show notes and listening options: epicenter.tv/499