Quantum Crypto Attack May Arrive as String of Silent Wallet Breaches

Crypto execs warn Q-day may look like ordinary wallet breaches, with Tether's minting key flagged as a prime target and timelines ranging from 2028 to the early 2030s.

Industry executives are raising a scenario that would make quantum computing threats harder to track than previously assumed: the first successful attack may leave almost no forensic trail at all.

Christopher Smith, CEO and co-founder of blockchain startup Quantus Network, said a powerful enough quantum computer could extract a private key from a public key exposed on-chain. That would allow an attacker to drain a wallet without ever breaching a device, exchange, or internal system. "When someone cracks your key, you don't get a memo saying how they did it," Smith told Cointelegraph.

Tether's Minting Key Flagged as High-Value Target

Much of the concern around "Q-day," the hypothetical moment when quantum computers can break standard public-key cryptography, has centered on Satoshi Nakamoto's dormant Bitcoin (BTC) holdings, valued at roughly $63 billion. Smith said those wallets may not be the first priority for a sophisticated attacker. Military systems and state secrets could come first, he argued, while crypto-focused attackers might aim at something more financially damaging.