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- BNB Smart Chain can adopt post-quantum security now, neutralizing long-term threats from upcoming quantum computers.
- Protecting the network requires larger digital signatures, which increases block sizes and lowers transaction speeds by nearly half.
- Using advanced cryptographic proof tools keeps validator data compact, preventing the blockchain network from collapsing under its own weight.
The threat of quantum computing tearing through modern cryptography feels distant, but the blockchain industry is already building defenses. A recent engineering report reveals that BNB Smart Chain (BSC) can successfully implement post-quantum security protocols today. This upgrade is not a reaction to a crisis but a forward-looking test of how the ecosystem will survive when advanced quantum machines eventually go live.
Lead network analysts note that while a true quantum threat is likely a decade or two away, deploying these shields now gives engineers time to iron out real-world performance issues. The primary target of this upgrade is elliptic-curve cryptography, the current standard that guards user private keys but remains highly vulnerable to quantum mathematics.
BSC Sacrifices Speed for Quantum Shielding
In order to protect the identities of users, the network changed their normal signature algorithm to ML-DSA-44, which is a quantum-resistant defense system that was just adopted by the international community. It provides solid defense parameters while maintaining the fastest computing speed possible.
Nevertheless, the adoption of the new system brings into consideration one crucial physical factor, post-quantum signatures are huge. With the new algorithm, each transaction signature goes from being miniscule at 65 bytes to being very large at 2,420 bytes. Therefore, each data block becomes much larger.
During extensive transaction processing tests, the size of each block reached almost 2 megabytes. Since the physical size of the data blocks increased greatly, the entire data traffic became too crowded, thus reducing transaction throughput by 40%-50%.
pqSTARK Compression Beats Blockchain Latency Chokepoints
The increase in data leads to changes in the rate at which the blocks will traverse through the different geographical locations. Through tests conducted in several regions, there were delays due to internet latency that reduced the number of transactions per second from around 4,900 to below 3,000.
To ensure the whole network does not come to a standstill, the team implemented an aggregation process known as pqSTARK. This process reduces several validations to a 1-to-43 ratio and shrinks kilobytes of data to only 340 bytes in the block header.
Blockchain researcher Marcus Vance notes that this prevents the consensus layer from overloading. Although the system will require more computing power, it has proven that decentralized systems can sacrifice speed for maximum security in future.
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