mmkorea - cf mask has partnered with CK&B Co., Ltd and implemented HiddenTag product authenticity verification solution. HiddenTag® C.O.P authenticity verification solution has been developed based on digital watermarking technology and it enables end-users to verify product authenticity with a Smartphone. The HiddenTag C.O.P technology has been implemented by company mmkorea - cf mask for product authenticity and product distribution monitoring purpose. We will continue to make every effort to provide better services. Thank you.