In 1991, Philip Zimmermann developed an encryption technology known as Pretty Good Privacy. Zimmermann, the CEO of PGP Corp., created ZRTP, a technology for encrypting Internet telephone calls. PGP Corp. has just released Zfone, which is ZRTP-enabled Voice over Internet Protocol (VoIP) software that prevents Internet telephone call wiretapping.
Forbes.com spoke with Zimmermann about why his company created Zfone which he offers to the public for free. The article is interesting because Zimmermann points-out the intelligence value of traffic analysis, which I mentioned in a previous article. Zfone makes it nearly impossible to eavesdrop on a conversation, but it does not prevent an intelligence service or police service from conducting traffic analysis.
VON Magazine also interviewed Zimmermann in its January 2007 edition about issues surrounding wiretapping and VoIP.
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