Penguin Random House Korea 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 Penguin Random House Korea for product authenticity and product distribution monitoring purpose. We will continue to make every effort to provide better services. Thank you.