Graham Cluley, Senior Technology Consultant at Sophos, discusses the phenomenon of social networking website Facebook, revealing the results of Sophos's Facebook experiment, and advises Facebook enthusiasts on how to properly secure their profiles.

Graham Cluley, Senior Technology Consultant, reviews the mid-2007 Security Threat Report, looking at the most widespread security threats during the first half of the year and advises listeners on how they can keep themselves safe online.

Richard Jacobs, CTO at Sophos, explores the concept of the dissolving network perimeter, discussing how security solutions are addressing new challenges, and offers some advice on how IT administrators can control and manage their users.

Fraser Howard, Principal Virus Researcher at SophosLabs, discusses zero-day threats, addresses the controversy surrounding the disclosure of vulnerability information, and offers advice to users and administrators on how to defend against these malicious programs.

Gurusamy Sarathy, Chief Technologist at Sophos, introduces managed appliances and discusses the benefits of vendors owning the security problem and whether managed appliances mean the end of desktop security.

Marc Borbas, Web Security Expert, highlights the growth in web-based threats, explains how browsing the internet can potentially place your organization at risk, and offers some advice on how to browse the web safely.

Vanja Svajcer, Principal Virus Researcher at SophosLabs, and John Stringer, Mobile Security Expert, discuss the increased uptake of mobile devices, explain how a mobile device can become infected, and provide some practical advice on how to protect your organization's mobile devices from attack.

Our experts Bill Emerick and Jeff Sturgeon introduce Network Access Control, discuss installation and deployment options, and explain why organizations should be looking to implement a NAC solution.

Graham Cluley, Senior Technology Consultant, reviews the Security Threat Report about the most widespread security threats during 2006, and asks what lies ahead for 2007.

Mark Harris, Global Director of SophosLabs, highlights the growth in image spam, the tactics spammers employ to evade spam filters and offers some advice to organizations struggling to deal with the problem.