Originally Posted by d1rX
FFOS seems to be on the right path
I think you mean FOSS = F
ree and O
oftware. Anyway, I fully agree, in fact, that is the ONLY way. Closed source encryption programs can't be 100% trusted by definition. There might be security flaws, intentional or not.
Anyway. the NSA has backdoors to every operating system, so if you're really a target, they get you. Also, there are more than enough security holes in the layers under the operating system.
I think what these phones are supposed to do is bring end-to-end encryption for e.g. industry users so they don't get spied on. The NSA and the US government can get their hands on encryption keys for servers like in Lavabits case. But this is the transport encryption. The data is, if not otherwise secured, available in plain text on the servers of providers. This also means, the officials can decrypt ANY data that comes in, not just the one of actual targets.
Now, end-to-end encryption makes sure even the provider can't see your data in plain text because you encrypt and decrypt it on your device. What Blackphone does is, it uses the apps from Silent Circle, a closed source encryption programm for VoIP and messages. Although the owner of that company is the well trusted cryptographer Phil Zimmerman, one can never be sure.
That's a good point. how a non blackphone device is gonna decipher the encryption? how is it going to get the key? How can a non blackphone device even a establish the same "secure" connection?
You can install and use Silent Circle on any(ok, a lot of) phone(s). Just make sure you don't have additional malicious software installed. Any yes, it costs $100/year or so. And you get a subscription for SpiderOak, sort of a Dropbox but they encrypt the data before uploading. Any you get a better overview over what app uses what permissions. A few extra tweaks basically.
Alternative: Android Phone with CyanogenMod/Replica. TextSecure for messages, RedPhone for VoiP and owncloud for files. Way cheaper too, and open source, also made by well respected cryptographers like Moxie Marlinspike
 zerohedge.com/news/2013-09-08/nsa-has-full-back-door-access-iphone-blackberry-and-android-smartphones-documents-re"]backdoors to every operating system