The Favorite Encryption Application of Edward Snowden came for Android
TextSecure, the preferred service for encryption and secure communication of Edward Snowden, is now available for Android. The application is now called Signal and combines the capabilities of several such services. Signal allows you to send messages and pictures and make calls for free.
All information sent and received is encrypted and decrypted on your device. This means that nobody but you and the person you are communicating will be able to access the information. The service does not require separate registration and use your phone number and information about your contacts. You can download Signal for iOS and Android.