Secure SMS в Android Market

Secure SMS (v. 1.0.17) Разработано Xolotl Loki

SecureSMS is a fully functional messaging app, able to read, write, send, and receive plain and encrypted text messages. Lock your mailbox, and no one will be able to read your stored messages.  Share your key with your friends, and exchange secure texts which can't be read, even if they are intercepted in transit.