Security Now! is a weekly podcast hosted by Leo Laporte and Steve Gibson. The first episode was released on 19 August 2005. Released each Thursday, Security Now! consists of a discussion between Gibson and Laporte of issues of computer security and, conversely, insecurity. Covered topics have included security vulnerabilities, firewalls, password security, spyware, rootkits, Wi-Fi, virtual private networks (VPNs), virtual machines, full virtualization, hardware-assisted virtualization, and virtual appliances.