Rising concerns around quantum computing’s ability to break blockchain encryption are prompting renewed urgency across the crypto industry, even as experts stress that the threat remains years away from becoming practical.
A new research from Google’s Quantum AI team suggested that breaking the cryptographic systems underpinning networks like Bitcoin (BTC) and Ethereum (ETH) may require fewer resources than previously estimated, lowering the barrier to potential attacks.
Quantum Risk Is A Known Engineering Problem
Despite the alarming implications, analysts say the industry has long anticipated such developments. Researchers at Bitfinex emphasized that the gap between theoretical feasibility and real-world execution remains significant.
“Quantum computing represents a genuine engineering challenge for the cryptocurrency industry, but it is far from an existential threat in the current form,” Bitfinex analysts said.
They noted that scalable, fault-tolerant quantum systems capable of executing such attacks are still not available, giving the industry time to respond.
Efforts are already underway, including post-quantum cryptographic standards finalized by National Institute of Standards and Technology and ongoing discussions around Bitcoin Improvement Proposal BIP-360.
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Accelerating Progress Raises Urgency Across Industry
Still, some experts argue the pace of quantum development is advancing faster than expected.
Stefan Deiss, CEO of The Hashgraph Group, pointed to Google’s decision to target 2029 for post-quantum migration as a critical signal.
He warned that the computational threshold required to break encryption has dropped sharply over the past decade, raising the likelihood that vulnerabilities could emerge sooner than anticipated.
“Cybercriminals and bad actors are already harvesting encrypted blockchain data today, stockpiling it to decrypt once quantum hardware catches up,” Deiss said, citing warnings from agencies including the U.S. Department of Homeland Security and the National Cyber Security Centre.
Bitcoin’s Existing Design May Expand Exposure
The issue is further complicated by protocol changes such as Bitcoin’s Taproot upgrade, which improved efficiency but increased the number of addresses with publicly exposed keys.
This has expanded the potential attack surface, with a significant portion of BTC potentially vulnerable under a future quantum scenario.
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