Blue Box podcast #23 is now available for listening. In this show, Jonathan and I discuss the latest VoIP security news including further items about Zfone, Bruce Schneier’s Wired News article, SIP attacks being slashdotted, university funding for VoIP security research and a couple of other telcom-related podcasts we have found. We also discussed a number of great comments we received from listeners and unveiled a new promotion to give away a copy of the new “VoIP Security” book from Syngress.