Computer consultation in the field of computer security; Computer security consultancy; Computer security consultancy in the field of scanning and penetration testing of computers and networks to assess information security vulnerability; Computer security service, namely, restricting access to and by computer networks to and of undesired web sites, media and individuals and facilities; Development of software for secure network operations; Maintenance of computer software relating to computer security and prevention of computer risks; Testing of security systems; Updating of computer software relating to computer security and prevention of computer risks