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Biggest Post-Quantum Challenge Facing Bitcoin: BNB Chain Research
TL;DR
BNB Chain Research highlights that post-quantum cryptography is crucial for blockchain, with a focus on the challenges posed by quantum-resistant signatures. The report suggests migrating to new cryptographic systems to enhance security against potential quantum attacks.
Key points
- Post-quantum cryptography is a major focus in blockchain
- BNB Chain Research identifies challenges with quantum-resistant signatures
- Migration to post-quantum security involves new cryptographic systems
Mentioned in this story
BNB Chain
Post-quantum cryptography is becoming a major focus across the blockchain industry as researchers prepare for the future threat of quantum computers. A new report from BNB Chain Research shows that the biggest challenge for blockchain networks may not be consensus systems, but the massive increase in transaction and block sizes caused by quantum-resistant signatures.
Migrating to post-quantum security
The research explored how BSC could migrate to post-quantum security using ML-DSA-44 transaction signatures and pqSTARK aggregation technology. The goal was to replace current cryptographic systems such as ECDSA and BLS, which could eventually become vulnerable to quantum attacks.
Source: BNBChain
According to the report, post-quantum readiness is technically possible today. However, the trade-offs are significant.
Current blockchain transactions are relatively small, but quantum-resistant signatures are much larger. A normal transaction on BSC is around 110 bytes today. After switching to ML-DSA-44, the average transaction size increases to roughly 2.5 KB. Block sizes also jump from around 130 KB to nearly 2 MB under similar transaction loads.
Can throughtput issue be addressed?
This increase directly affects network performance. In testing, throughput dropped by around 40% to 50% because larger blocks take longer to propagate between nodes. Cross-region finality delays also increased, especially under heavy load.
Researchers said the main bottleneck was not the consensus mechanism itself. Consensus aggregation remained efficient thanks to pqSTARK compression, which reduced validator signature data by roughly 43 times. Instead, the biggest issue came from the network needing to move much larger amounts of data.
The report also explained why BNB researchers selected ML-DSA-44 instead of larger variants. The chosen version offers strong enough security while keeping signatures smaller and verification speeds faster, making it more practical for high-throughput blockchain environments.
Q&A
What is the biggest challenge for Bitcoin regarding post-quantum cryptography?
The biggest challenge is the significant increase in transaction and block sizes due to quantum-resistant signatures.
How can BSC migrate to post-quantum security?
BSC can migrate by using ML-DSA-44 transaction signatures and pqSTARK aggregation technology to replace vulnerable cryptographic systems.
Why is post-quantum cryptography important for blockchain networks?
Post-quantum cryptography is important because it addresses the potential vulnerabilities of current cryptographic systems to future quantum attacks.
