[Cryptography] The crypto behind the blackphone

[Ralf Senderek]

While the list hesitates to draft a clear picture of the next generation 
secure communication solution, Phillip Zimmerman has the NSA-proof, 
comprehesive tool ready for sale, the blackphone.

According to the news here
http://thehackernews.com/2014/01/Blackphone-encypted-PrivatOS-smartphone-Silent-Circle_15.html#
the blackphone is "a Smartphone that’s been designed to enable secure, encrypted 
communications, private browsing and secure file-sharing." And it is based 
on an open source OS called PrivatOS, derived from Android.

Does anyone know more about the crypto behind the blackphone?
Is it a proprietary solution or an attempt to solve the real problem?


          --ralf