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A comment on PGPfone (1995).

Re:PGPfone (1995) by p4bl0 on Saturday August 31, 2013 @02:11PM (#6307548)
I've recently given a try to Jitsi [1] and seriously it works great. It really is a Skype drop-in replacement, and is fully open source. Without any need for configuration, I could discuss by text, audio, and video (and also do screen-sharing) all encrypted between my Debian laptop and a Windows PC, using existing XMPP (Jabber) account.

Really I've never seen any other free software do as good as Jitsi in the VoIP field. I've always tried SIP client and it was never perfect. Jitsi can do SIP to, but does wonder over XMPP so I didn't even try SIP.

[1] http://jitsi.org/

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Re:PGPfone (1995) by frank_boyd on Saturday August 31, 2013 @02:30PM (#6307619)
Does it encrypt PGP-style?
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Re:PGPfone (1995) by rdtsc on Saturday August 31, 2013 @03:07PM (#6307738)
More like ZRTP style, also not sure exactly what you mean by PGP-style
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Re:PGPfone (1995) by verandaguy on Saturday August 31, 2013 @05:15PM (#6308129)
PGP gathers entropy for keys using user interactions with the computer (mouse movements, keyboard input, normal usage) as well as disk and memory activity, making for more true random number generation than the PRNG that uses the pool in many modern processors, which could be 'fixed' by the NSA following recent revelations.
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Re:PGPfone (1995) by p4bl0 on Saturday August 31, 2013 @05:45PM (#6308250)
That's not specific to PGP at all.
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Re:PGPfone (1995) by verandaguy on Saturday August 31, 2013 @07:50PM (#6308549)
No, but it's known for being commonly used in PGP. I could be wrong, but that's what I understand when someone says, "PGP-style encryption."
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Re:PGPfone (1995) by RDeckard on Sunday September 01, 2013 @12:43AM (#6309180)
"PGP-style encryption" probably implies public-key cryptography.

Like the other poster said, using various computer inputs to feed the entropy source during key generation is not specific to PGP or public-key cryptography at all.

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Re:PGPfone (1995) by verandaguy on Sunday September 01, 2013 @01:09AM (#6309223)
That seems like a misleadingly-broad term, but sure. IMO, public-key cryptography (or just asymmetric crypto) is already an improvement over "the Diffie-Hellman key exchange," which is what's generally implied when talking about public-key crypto.
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