- Digital Defences
 - Provides security consultancy and managed solutions to businesses and public sector bodies in the U.K. - etest associates
- Provides computer security, performance tuning, monitoring, and risk based tests for Internet, networks, and Web, as well as quality assurance and translation testing.
- Infocell
- Offering managed e-security services including email scanning, content filtering, vulnerability testing, managed firewalls, and VPNs.
- Internet Security Consultants
- Offers attack penetration testing and advice services to prevent hacking and unauthorized access to online networks and servers.
- Network Defence
- Specialising in network security management for corporate and public sector clients.
- Parkinson Howe Ltd
- Offers business continuity, information security, disaster recovery, and biometric services.
- Sec-Tec
- Internet and computer security consultants operating in government and commercial firewall, VPN, and IDS areas.
- Vigilis
- Provides security solutions, penetration testing, risk assessment, security policy development, and business continuity planning.
- Zeuros Network Solutions
- Consulting agency specialising in secure network systems, firewalls and secure dialup solutions
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