PGP Inventor to Encrypt Net Calls

"The creator of a well-known tool for keeping e-mail safe from prying eyes is now working on a program that he says will help stop eavesdroppers from listening in on Internet-based phone calls.

Phil Zimmermann, who created the Pretty Good Privacy program for encrypting e-mail traffic, planned to demonstrate a prototype of his Voice over Internet Protocol security program Thursday during the Black Hat Briefings security conference in Las Vegas."