How does Redphone encryption work? Redphone is known for providing encryption for end-to-end calls. I am eager to know how it protects our privacy from telecom companies. 

How does it secure our call and text and protect our privacy from even telecom companies?
It uses a Protocol called zrpt to encrypt your voice which then is transfered via voice over ip.

http://en.m.wikipedia.org/wiki/ZRTP