Skype: Did skype low cost network helped them making profit faster?
Phil Wolff of Skype Journal answers this question on Quora
SMS ?
after source code reading (and chrome dev console output observing) you have to realize: 1. there is need of 'signaling server' 2. session encryption keys are exchanged through that server
yes, anyone could setup their small server and call through it an make sure tls / ssl cert of their server is intact etc. that will not be a case for avg Joe. not to mention tat browser itself will be an attack vector.
Phil Wolff of Skype Journal answers this question on Quora
http://expertmiami.blogspot.fr/2012/05/to-all-tin-foil-hat-w...