[MereKatMoves]

Having used all the encrypted call possibilities there are , you are, in my opinion, absolutely spot on. SC has exceptional clarity. WA isn't bad.

Can you talk more about "our guys" in respect to the fact that the CIA and NSA use the Blackphone? Should I, as a casual business person, be wondering that the handsets you supply to them are in some way compromised? I know that both the NSA and the CIA are interested in my phone conversations, which is why I ironically bought a Blackphone (for when I assume they are listening) and others which make their life harder (but I do accept that I do this more for the kicks of making them work for their intel)

tl:dr - is SC actually secure given that the company has been short on cash for a while and that the CIA and NSA equip their agents with the same phones. I don't mind talking because I have nothing to hide, but backdoor code is usually the case if you are selling 10k phone units to US LE.

[StavrosK]

As far as I know (and I'm not really very high up in the hierarchy, nor do I know much about the Blackphone hardware), the NSA and CIA are buying them because they are secure. I heard they had a list of phones/apps they are allowed to use internally, and SC was pretty much the only app that made the list at the time.

Keep in mind that "an organization using a secure app" and "an organization wanting to spy on people" are pretty independent goals. I haven't poked around in the client source too much (although I have implemented some stuff for the Android client), but:

1) Nothing in the client seemed out of place. 2) I've seen every line of code running on the web backend and there's nothing untoward going on. 3) Given the culture, I think many of the high-level people would quit before they compromised the product. Especially Phil, who has been sued by the US government for exporting strong cryptography before.