A quantum attack on blockchain could appear as unexplained wallet breaches without forensic evidence, warns Quantus CEO.
The first sign of a quantum computing breach in cryptocurrency may not be a high-profile theft but a series of unexplained wallet breaches. Attackers with a cryptography-breaking quantum computer could derive private keys from public keys, moving funds without leaving traces of a system compromise.
Advances in quantum algorithms have lowered the computing power needed to break elliptic-curve cryptography used by major blockchains. Unlike traditional hacks, a quantum attack might lack forensic evidence, making detection difficult.
Experts suggest the hypothetical “Q-day”—when quantum computers crack standard cryptography—could arrive without warning, targeting less secure wallets first rather than high-profile assets like Satoshi Nakamoto’s Bitcoin holdings.