Phil Zimmerman invented PGP over a decade ago and at the time he took a lot of heat for doing that. His latest project, Zfone, turns nearly any VoIP client in a more secure communications channel. I've written about it before and you can read those articles here on our Web site.
I recently ran across an interesting interview to Zimmerman did with VON Magazine. If you'd like to read it then the interview is available online in the magazine's digital edition. Click the "Contents" link at the top of the page and select page 14, where the article beings.