Cut & Paste from boingboing.net:
Great information-security weekly podcast
A podcast can teach you the fundamentals of information security in small, easily digested weekly chunks. Security Now is a wonderful podcast from Leo Laporte and Steve Gibson, with a new episode every week. Gibson covers a number of high-level subjects -- securing your traffic on WiFi networks, choosing good passwords, etc -- as well as topical ones -- understanding rootkits and worms -- and answers listener questions.

The past two shows have marked the commencement of a new series on how the underlying infrastructure of the Internet works -- what's IP, what's UDP, how do packets traverse the Internet, and so on. This is building a foundation for deepening understandings of Internet security issues.

All told, the show is a running master-class in infosec, a great primer for those of us hoping to deepen our understanding of security online.

http://www.grc.com/SecurityNow.htm