Aptos launches protocol-native encrypted mempool on mainnet, adding ~20ms latency per block

Aptos says its encrypted mempool is the first protocol-native implementation, meaning validators who order transactions also hold decryption shares, so no new party must be trusted. Encryption is opt-in per transaction; sender address and fee stay visible, while payload, function and arguments are hidden until finalization. A batched threshold encryption scheme adds roughly 20ms latency per block in 50-node benchmarks, which Aptos calls a small fraction of sub-second finality. Petra surfaces the option in signing; Decibel will use it for private orders. ZKSecurity reviewed the implementation.

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