BackML-DSA

ML-DSA

Quantum Compu
2026-07-12 10:46:17

IOSG says quantum computing won’t end crypto, but it could force a full Web3 security overhaul

IOSG argues that quantum computing is not a doomsday button for cryptocurrencies, but it does pose a serious long-term threat to the cryptographic foundations of Web3. In a reposted article by 0xjacobzhao, the firm says the real danger is not that blockchains suddenly stop working, but that a cryptographically capable fault-tolerant quantum computer could derive private keys from already exposed public keys and produce valid signatures on-chain. That would put extreme pressure on three core properties of public blockchains: permanently public ledgers, irreversible asset transfers, and self-custodied private keys. The article says the industry’s problem is no longer a lack of post-quantum cryptography. Instead, the hard part is coordination. Bitcoin and Ethereum face different migration problems: Bitcoin must deal with exposed legacy UTXOs, signature-size expansion, and governance disputes over dormant coins, while Ethereum is working on a broader migration across accounts, validator signatures, data availability, and zero-knowledge systems. IOSG points to a 5 to 8 year “engineering comfort window” before quantum risk becomes much harder to manage, even though broader Q-Day estimates remain centered around 2035 to 2045, with faster scenarios falling in the 2030 to 2035 range.

1040
IOSG says quantum computing won’t end crypto, but it could force a full Web3 security overhaul