Authentication, issuance and validation of digital certificates; Software authoring; Software design and development; Software development in the framework of software publishing; Computer security services, namely, restricting unauthorized access to websites; Computer security services, namely, restricting unauthorized access to mobile applications; Computer software design; Computer software development; Computer security services in the nature of providing authentication, issuance, validation and revocation of digital certificates; Developing computer software; Hosting an online community website featuring shared communications between community members interested in personal and small business computer information security; Providing user authentication services using single sign-on technology for online software applications; User authentication services using single sign-on technology for online software applications; User authentication services using technology for e-commerce transactions