The Junkies revisit VoIP hacking, this time with the help of the security experts who made ‘VoIP Hopper,’ a tool that lets a PC hop on to your voice virtual LAN from your data VLAN. Vigilar security consultants Jason Ostrom and John Kindervag join Dan York, Voice over IP Security Alliance best practices chair, and Jessica Gdowski, Voice Report editor to explain vulnerabilities and security measures.