KT is moving to expand its quantum security business, which combines quantum key distribution (QKD) and post-quantum cryptography (PQC). The company is pursuing a pilot project to transition defense-sector encryption systems to PQC, while also developing long-distance QKD technology capable of reaching as far as Jeju Island.
KT unveiled the business strategy at a quantum encryption technology study session held in Gwanghwamun, Jongno-gu, Seoul, on Monday.
KT is currently developing a "Quantum-Safe Network" that combines QKD and PQC. QKD is a technology that can detect eavesdropping attempts during the encryption key transmission process, while PQC is a next-generation encryption method applying a mathematical structure that is difficult to decode even with quantum computers. Combining the two technologies can enhance security by protecting both the encryption key transmission section and the encryption algorithm.
The Quantum-Safe Network being developed by KT applies QKD in the transmission section to protect encryption key delivery and applies PQC in the access and service sections to strengthen the security of the encryption system. Over the medium to long term, KT plans to build a communications environment that securely protects customer data based on the Quantum-Safe Network.
Meanwhile, KT is conducting a pilot project this year to transition existing encryption systems applied to defense-sector drones, closed-circuit television (CCTV), and control systems to PQC. It is also developing long-distance QKD technology to extend its quantum encryption network as far as Jeju Island. "We will expand our role as a quantum security provider equipped with PQC transition capabilities, going beyond simply supplying equipment," said Cho Min-kyun, head of KT's dedicated line service team.
