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; Computer security consultancy; Computer network security consultancy; Computer programming and maintenance of computer programs; Computer security service, namely, hard drive erasure; Computer security service, namely, restricting access to and by computer networks to and of undesired web sites, media and individuals and facilities; Maintenance and updating of computer software; Maintenance and upgrading of computer software; Maintenance of computer software; Computer security consultancy in the field of scanning and penetration testing of computers and networks to assess information security vulnerability; Computer security consultancy in the field of viruses; Computer security services, namely, restricting unauthorized access to viruses; Computer security services, namely, restricting unauthorized access to third parties; Computer security services, namely, restricting unauthorized network access by viruses; Computer security services, namely, restricting unauthorized network access by third parties; Computer security threat analysis for protecting data; Data security consultancy; Design and development of electronic data security systems; Installation and maintenance of computer software; Internet security consultancy; Maintenance of computer software relating to computer security and prevention of computer risks; Services for maintenance of computer software; Updating and maintenance of computer software; Updating of computer software relating to computer security and prevention of computer risks