Binance’s BNB Chain tests quantum defense, sees 40% drop in throughput
Binance's BNB Chain is testing post-quantum cryptography to enhance security. However, this upgrade has resulted in a significant decrease in network throughput, with speeds dropping by 40% to 50%. The increase in transaction signature size poses challenges for maintaining efficiency.
- ▪BNB Chain is experimenting with post-quantum digital signature schemes and aggregation protocols.
- ▪The upgrade has led to a 23x increase in the size of transaction signatures.
- ▪Block sizes have expanded from approximately 130 KB to nearly 2 MB under similar network loads.
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<img src="https://static.cryptobriefing.com/wp-content/uploads/2026/05/19065806/bnb-chain-takes-aim-at-tomorrow-s-cyber-threats-with-quantum-1-800x420.jpeg" alt="Binance’s BNB Chain tests quantum defense, sees 40% drop in throughput" class="w-full aspect-[19/10] object-cover" /> Binance’s BNB Chain tests quantum defense, sees 40% drop in throughput Post-quantum cryptography experiments on BNB Smart Chain reveal a stark tradeoff between future-proofing security and maintaining network speed. Share Add us on Google by Editorial Team May. 19, 2026 BNB Chain has begun testing post-quantum cryptography on the BNB Smart Chain, and the early results are a mixed bag. The security upgrade works. It also makes the network roughly 40% to 50% slower.
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