Computer security services in the nature of providing authentication, issuance, validation and revocation of digital certificates; 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; Maintenance of computer software relating to computer security and prevention of computer risks; Data encryption services; Design and development of electronic data security systems; Design and development of home security systems; Development of security systems and contingency planning for information systems; Engineering and system analysis in the field of home security systems; Internet security consultancy; Technical support, namely, monitoring technological functions of computer network systems; Testing of security systems; Updating of computer software relating to computer security and prevention of computer risks