On the 5th, KT announced that it has completed preparations for the commercialization of Post-Quantum Cryptography (PQC) technology.

Post-Quantum Cryptography (PQC) is a new public key cryptography method that addresses the threat to existing cryptographic systems posed by advancements in quantum computing technology. It employs complex mathematical algorithms, making it virtually impossible for even high-performance quantum computers to crack, requiring billions of years to decipher.

KT independently developed the Quantum Encryption Device (QENC) as a stand-alone model and designed a PQC solution service through technology transfer. The KT PQC solution can provide encrypted keys generated from Quantum Key Distribution (QKD) devices as well as keys via PQC algorithms, enabling the construction of a hybrid quantum security network.

This hybrid quantum security network combines Quantum Key Distribution (QKD) technology, which fundamentally prevents eavesdropping attempts on physical lines, with PQC that offers security impervious to decryption by quantum computers, enhancing safety through a dual security approach. Additionally, it supports encryption functions for various user-based service interfaces, with capabilities of 1G/10G/100G speeds for network devices.

The QENC’s external key interface is designed to comply with the international standard ETSI GS QKD 014, based on an open interface. Therefore, accessing external PQC keys requires merely connecting to the PQC server, without the need to change encryption devices.

Secure external key access uses TLS 1.3, which is employed for secure communication over the internet, enhancing security. Additionally, since it operates as a format supplied from a separate PQC server, it can quickly respond to national security requirement verifications. Moreover, the application of NIST-standard PQC algorithms, CRYSTALS-Dilithium and CRYSTALS-Kyber, on the device is designed to strengthen data security.

In South Korea, public institutions must undergo security compatibility verification to utilize quantum encryption communication equipment. KT’s QENC device applied for a security function confirmation test in May, and it is expected that once the issuance of the security function confirmation certificate is completed in July, it can be utilized by all institutions in the country.

Baek Seung-taek, Senior Vice President of KT Enterprise Data Business, stated, “With the commercialization of the hybrid stand-alone QENC device and PQC solution, KT will continue to play a leading role in activating the domestic quantum encryption communication market.”

Lee Jong-sik, Senior Vice President of the KT Network Research Institute, expressed, “We will strive for technology development to contribute to improving the quality of KT’s quantum encryption communication services and strengthening the capabilities of the domestic quantum industry.”

Lee Sang-jin daedusj@autodiary.kr