KT is upgrading its zero-trust security strategy and applying an always-on prevention and proactive response system across its companywide systems.

KT said on Saturday it will build an early threat detection framework and strengthen its breach damage prevention strategy based on its experience of proactively introducing a zero-trust network access (ZTNA) solution.

To shift its security framework toward proactive response, KT introduced a behavior-based detection system. It uses an endpoint detection and response (EDR) system to analyse abnormal behavior on individual devices such as PCs and servers. It uses a network detection and response (NDR) system to analyse abnormal traffic and signs of attacks across the network in real time.

KT will also establish a system that detects abnormal behavior in multiple ways through its early detection system. The aim is to identify additional attack activity early, including unknown new attacks as well as abnormal access after internal infiltration.

KT will also upgrade its micro-segmentation architecture so it can block the spread of damage early if a security breach occurs. Micro-segmentation is a technology that prevents damage from spreading to other systems by controlling routes for threat propagation after an attacker infiltrates internal systems.

KT piloted micro-segmentation in key systems and some work environments. It plans to complete operational stability checks and policy verification within this year and then expand its application to the entire work environment.

Chang-oh Kim (김창오), KT's chief privacy officer and executive director, said KT will continue to proactively apply advanced security technologies to keep security for key business systems and services at the highest level.