Authentication, issuance, and validation of digital certificates; computer security services in the nature of providing authentication, issuance, validation, and revocation of digital certificates, digital security tokens, and access privileges for online services; providing user authentication services using single sign-on technology for online software applications; providing user authentication services using indexed physical hardware and software technology for e-commerce transactions; providing user authentication services using single sign-on technology, third-party authentication, and indexed credentials, for e-commerce transactions; providing user authentication services using indexed credentials in the nature of hardware and software technology for managing access to digital content, e-commerce transactions, secure entry and exit door access, and user authentication; design and implementation of software and technology solutions for the purpose of product and digital platform authentication and tracking, and brand monitoring and protection, to protect against counterfeiting, tampering, and diversion, and to ensure the integrity of genuine products and access to digital platforms; computer security services, namely, validating user credentials and restricting unauthorized network access by users without credentials; computer security services, namely, enforcing, restricting, and controlling access privileges of users of computing resources for cloud, mobile, or network resources based on assigned credentials