# Aptos Turns On an Optional Encrypted Mempool on Mainnet to Hide Pending Trades From Front-Runners

Validators order transactions without seeing their contents until the block is final. The sender address and fee stay visible, and tests showed about 20 milliseconds of added delay per block.

- Published: 2026-10-13T05:42:08.752Z
- Canonical: https://polylog.news/crypto/2026-10-13/aptos-turns-on-an-optional-encrypted-mempool-on-mainnet-to-h
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [crypto.news](https://crypto.news/aptos-launches-encrypted-mempool-how-does-it-work/), [TradingView / CoinMarketCal](https://www.tradingview.com/news/coinmarketcal:01d25b63e094b:0-aptos-launches-opt-in-encrypted-mempool-on-mainnet-12-oct-2026/), [The Crypto Times](https://www.cryptotimes.io/2026/10/13/aptos-activates-encrypted-mempool-to-limit-crypto-transaction-front-running/), [Aptos Foundation Forum](https://forum.aptosfoundation.org/t/aptos-introduces-built-in-mev-protection-with-encrypted-mempools/17175)

Aptos, a layer-1 blockchain, launched an encrypted mempool on mainnet on October 12. The mempool is the queue where transactions wait before they are added to a block. The feature is meant to protect pending trades from front-running and sa…

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