Let me get this straight.  This app is designed to run only on fully compromised (back doored) devices right?  

Lets move past that for a second and assume we don't care about those players who have that access, and are just trying to fend off script kiddies and low level advertisers / spamz0rs.

Now, where is my private key stored?  How do I verify that I have the public key of your private key, in other words how do we know there is no MIM going on?  

Is a key fingerprint easily available?