Naver rolls out post-quantum cryptography as Korean finance faces Q-Day clock

Naver has rolled out post-quantum cryptography, according to KED Global, as South Korea’s financial sector confronts growing concern over “Q-Day” — the point at which quantum computers could undermine widely used encryption methods. The move places one of Korea’s largest internet companies among organizations preparing for a potential shift in cybersecurity standards.

Post-quantum cryptography refers to cryptographic systems designed to resist attacks from sufficiently powerful quantum computers. Much of today’s digital infrastructure, including online banking, payments, communications and identity systems, relies on encryption approaches that could eventually be vulnerable if quantum computing reaches the required scale. The timing of that threat remains uncertain, but migration can be complex because encryption is embedded across networks, software and long-lived data.

For Korean finance, the Q-Day discussion highlights the need to assess cryptographic dependencies and plan transitions before a quantum threat becomes practical. Naver’s rollout underscores how preparations are extending beyond research into deployments by major technology companies. Post-quantum adoption is likely to involve technical testing, interoperability work and coordination across companies and institutions as new standards are introduced.