Hear about the NSA recently? Want to be on the outside of the entire debate?
Learn about these:
https://www.torproject.org/ – Browse Internet Anonymously
https://guardianproject.info/apps/orbot/ – Tor for Android
http://www.gnupg.org/ – Encryption for email and files.
http://www.epassafe.com – Secure your Passwords
http://www.truecrypt.org – Full Disk Encryption
https://play.google.com/store/apps/details?id=info.guardianproject.otr.app.im – OTR Messaging Chat
I’ve personally have used and still use these solutions for my needs.