Authentication of data in the field of Augmented Reality, and Mixed Reality Services using blockchain technology; Computer programming services for creating augmented reality videos and games; Design and implementation of software and technology solutions for the purpose of product and document authentication and tracking, and brand monitoring and protection, to protect against counterfeiting, tampering, and diversion, and to ensure the integrity of genuine products and documents; Electronic document and e-mail authentication and time-stamping services using the time stamp of a national post office; Electronic document and e-mail authentication services; Electronic signature verification services using technology to authenticate user identity; Providing user authentication services using biometric hardware and software technology for e-commerce transactions; Providing user authentication services using biometric hardware and software technology for Augmented Reality, and Mixed Reality Services; Providing user authentication services using single sign-on technology for online software applications; Providing user authentication services using Augmented Reality, and Mixed Reality Services for e-commerce transactions; User authentication services using blockchain technology for Augmented Reality, and Mixed Reality Services; User authentication services using single sign-on technology for online software applications; User authentication services using technology for e-commerce transactions