BSC Post-Quantum Upgrade Passes Test, But TPS Falls 40%

• BNB Chain has replaced its existing ECDSA encryption algorithm with ML-DSA-44.
• Test data showed signature size increased from 65 bytes to 2,420 bytes, while TPS dropped by ~40%.
• BSC’s latest test keeps the user-facing stack familiar while changing the cryptography.

BNB Chain released its BSC Post-Quantum Cryptography Migration Report, confirming that quantum-resistant transaction signing is feasible, but at the cost of significant performance overhead.

Replacing ECDSA With ML-DSA-44

The latest protocol replaces the existing ECDSA transaction signatures with ML-DSA-44 and moves consensus vote aggregation toward pqSTARKs, while maintaining compatibility with existing addresses, RPC endpoints, and wallets.

Notably, the data overhead recorded from the test shows that signature size rose from 65 bytes to 2,420 bytes, and cross-region TPS fell by about 40%. BNB C…

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