Lightning Network structurally vulnerable to quantum computing, says co-founder

Udi Wertheimer, co-founder of Taproot Wizards, has argued that the Lightning Network is structurally vulnerable in a quantum computing environment. According to CryptoPotato, he explained that if a cryptographically relevant quantum computer (CRQC) capable of reverse-engineering private keys from public keys emerges, the risk of fund theft would increase. This is because the Lightning Network's design necessitates the sharing of public keys. Wertheimer noted that, unlike on-chain transactions, avoiding key exposure is difficult, and the network's reliance on third-party storage structures also elevates the risk.