Aptos has activated its Encrypted Mempool on mainnet, adding transaction-intent protection to a privacy stack that already includes Confidential APT and Keyless Accounts. According to the official Aptos Labs announcement, the new AIP-144 feature lets users conceal transaction payloads until validators have committed to their ordering, reducing the information available for frontrunning and sandwich strategies before execution.
The October 12 activation should be separated from Confidential APT, which reached mainnet earlier through AIP-143. Aptos now has two operational privacy mechanisms addressing different stages of a transaction: pre-execution intent and post-execution financial amounts. Both remain optional rather than changing the default transparency of every transaction on the network.
Encrypted Mempool Hides Intent Before Execution
Under AIP-144, a compatible client encrypts the Move function and its arguments before submitting a transaction. Validators can include and order the ciphertext without seeing those instructions, then reconstruct the decryption key through stake-weighted threshold cryptography after consensus fixes the block. The same validator set responsible for consensus also performs decryption, avoiding a separate external decryption committee.
The protection is temporary rather than permanent. Sender information and gas parameters remain visible while a transaction is pending, and the payload becomes public after the block is finalized and decrypted. Encrypted Mempool therefore provides pre-execution confidentiality, not anonymous or permanently private transactions. Existing Move contracts require no modification, while the Aptos TypeScript SDK from version 7.0.0 supports client-side encrypted submissions.
Petra is the first wallet to expose the feature directly during signing, while Decibel plans to use encrypted submissions for perpetual orders. That integration is relevant because Decibel has already processed more than $7.7 billion in cumulative trading volume across 31 million trades. High-frequency trading provides a concrete environment in which concealing order intent before execution may matter, although announced support does not yet quantify how much Decibel volume will use encryption.
Confidential APT Protects a Different Data Layer
Confidential APT addresses information that remains on-chain after settlement. Its zero-knowledge system allows users to encrypt APT balances and transfer amounts while validators verify that transactions remain valid. Sender and recipient addresses stay public. The feature protects financial values rather than transaction relationships, creating selective confidentiality without making the Aptos transaction graph invisible.
That capability has been available through Petra on mainnet since August. Confidential transfers involve additional client-side proof generation and higher execution costs than ordinary transfers, while incoming confidential funds must enter a pending balance before becoming spendable. Privacy consequently introduces computational and wallet-management trade-offs rather than functioning as a cost-free replacement for ordinary APT transfers.
Keyless Accounts form a third, older component of Aptos’s broader architecture. They allow users to authenticate through services such as Google without publicly linking that social identity to the corresponding blockchain account. Keyless addresses, confidential balances and encrypted pending transactions solve separate problems and should not be treated as one privacy primitive.
The additions arrive as Aptos processes millions of daily transactions at very low average fees, with recent data showing roughly 9 million daily transactions. That existing throughput provides scale for testing the new cryptography, but mainnet availability does not demonstrate widespread privacy adoption. The relevant measurements will be the share of transactions opting into encrypted payloads, Confidential APT usage, added latency and fees, and whether applications such as Decibel integrate the protections into recurring production activity.