ICTK Holdings is an IoT security company that commercialized 'PUF' (Physical Unclonable Function) for the first time in the world. Puff is a cutting-edge technology that creates a security key that cannot be copied by making micro changes to the chip structure during the semiconductor process. In the standard (ISO/IEC 20897-1) announced at the end of last year, the International Organization for Standardization (ISO) stated that "the existing security module is fatal to reverse engineering hacking" and officially proposed PUF as an alternative. The Global Semiconductor Association (GSA) also recently replaced the reference of puff-related technical white papers in the IoT subcommittee with ICTK (Via PUF) instead of existing European companies such as Philips. ICTK, the world's only 'QPUF chip' technology that combines PUF with post-quantum technology, is providing various authentication solutions between devices and networks to three domestic telecommunication companies including LGU+. Recently, these three companies are building various collaboration models related to quantum security. Serious about IoT security..PUF restaurant, ICTK!