Ideas 1) Bundle a snapshot of the global contact list with the APK. Assume that end users will be on 3G or WI-FI when installing the program. I suppose that is

Ideas 1) Bundle a snapshot of the global contact list with the APK. Assume that end users will be on 3G or WI-FI when installing the program. I suppose that is is worth looking at the assumption about what is the largest download that we can live with under EDGE. The current TextSecure APK is 2.5MB as far as I can tell. The best case for the APK download is 1.4 minutes (236kbit/s). If the size is essentially zero, then we need to move to idea 2. 2) Split the rate-limiter into an anonymous proxy controlled by a partially trusted third party. Open Whisper Systems controls the database, but not the proxy. Open Whisper Systems doesn't know where the request comes from. The rate limiter doesn't know what is requested. Edit: forgot to complete a sentence