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Quantum Is Key to Securing Blockchain, Say Russian Researchers


A basic representation of quantum key distribution.

Researchers in Russia have devised a way to use quantum key distribution to address blockchain security.

Credit: Khaled Elleithy

Russian researchers have used quantum key distribution (QKD) to address the issue of blockchain security.

Evgeniy Kiktenko of the Russian Quantum Center in Moscow says blockchain's reliance on digital signatures makes it susceptible to attacks by quantum computers, so his team developed a blockchain platform that integrates original state-machine replication with QKD for authentication.

"Each QKD communication session generates a large amount of shared secret data, part of which can be used for authentication in subsequent sessions," notes the Russian Quantum Center's Aleksey Fedorov. "Therefore, a small amount of 'seed' secret key that the parties share before their first QKD session ensures their secure authentication for all future communication. This means QKD can be used in lieu of classical digital signatures."

The Russian Quantum Center's Alexander Lvovsky agrees the new protocol can "maintain transparency and integrity of transactions against attacks with quantum algorithms."

From Asia Research News
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