Aptos launches encrypted mempool to curb MEV frontrunning; devnet live, governance vote next

Aptos has proposed and started rolling out an Encrypted Mempool, a protocol-level upgrade aimed at reducing validator/front-running and orderflow manipulation. With Encrypted Mempool, traders can submit transactions as encrypted payloads, hiding transaction intent from validators and observers until block ordering is finalized and the block is confirmed. Technically, Aptos uses batched threshold encryption integrated into consensus. Validators can order encrypted transactions without seeing their contents, then the network decrypts and executes after ordering. Aptos says batched decryption keeps overhead around O(n) and introduces no meaningful new trust assumptions or performance impact. Status is a key catalyst for APT traders: Encrypted Mempool is live on devnet, support is expected to move to testnet soon, and mainnet deployment requires governance approval. The feature is opt-in, with a single-click setting per transaction. Why it matters for trading: in high-volume DEX markets, front-running and sandwich attacks often monetize MEV leakage from pending transaction visibility. By moving protection into the protocol layer (instead of relying on third-party private pools), Aptos targets earlier intent exposure. Watch for governance vote outcomes and any testnet findings on performance and encryption robustness. Adoption may be uneven because the Encrypted Mempool only works when traders actively opt in.