1. Security SSL.
http://developer.android.com/training/articles/security-ssl.html#Concepts
2. Android Developers (2015).
https://developer.android.com/index.html
3. bitShark (2016).
https://play.google.com/store/apps/details?id=blake.hamilton.bitshark
4. DroidWall (2016).
https://code.google.com/p/droidwall/
5. Dumpster image and video restore (2016).
https://play.google.com/store/apps/details?id=com.baloota.dumpster