Google research cuts quantum attack resource estimates by 20x. Binance CSO Jimmy Su says current threat is low, but migration coordination is the real challenge.
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Quantum security has moved higher on the crypto industry's technical agenda after Google Quantum AI research published in March 2026 showed that future quantum computers could require significantly fewer resources to attack the elliptic-curve cryptography protecting Bitcoin and Ethereum. The research estimated that fewer than 500,000 physical qubits could eventually be sufficient for such attacks. Current machines remain far from that capability.
Binance chief security officer Jimmy Su addressed five key issues raised by the research in a recent interview. Su said existing quantum hardware is nowhere near the scale needed to break the cryptography securing major networks. The Google research reduced previous resource estimates by about 20 times. The threat is not imminent.
Most users do not need to change their security habits yet, Su said. The biggest threats remain conventional attacks: protecting seed phrases, using reputable wallets, updating software and avoiding phishing attempts. Those defenses are still the most effective.
Post-quantum algorithms already exist. Implementing them across decentralized networks is considerably harder. Bitcoin, Ethereum and other blockchains have independent developers, governance structures, wallets, exchanges, validators and users. A migration requires coordination rather than a single software update, Su said.
Old or inactive wallets pose one of the most complicated questions. Some blockchain addresses may eventually rely on cryptography vulnerable to sufficiently powerful quantum machines. Their owners may be unreachable or have lost their keys. Ethereum researchers have already examined several potential quantum attack surfaces involving accounts, smart contracts and infrastructure, Su said.
Binance is approaching quantum security as a long-term infrastructure issue. Su said the exchange is monitoring developments in quantum computing, evaluating post-quantum cryptographic standards and preparing its systems for eventual industry migration.
Timing is the final question. Su said the industry has an advantage because the threat is visible before it becomes operational. Crypto developers can test new cryptographic systems, improve wallet architecture and coordinate upgrades while current networks remain secure.
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