Locking More Than The Lock Screen: Top Security Apps For The Smartphone

Secure SMS

The makers of RedPhone also develop TextSecure for Android, a free and open-source SMS app that replaces Android's native messaging with one that keeps SMS messages private with encryption. There's a version for iPhone called Red Phone, but it looks fairly early-stage. Instead, we recommend iEncryptText. Of course, there's always WhatsApp, which encrypts all messages and works on all platforms.

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