This app will detect incoming encrypted messages and fire a notification. You can decrypt messages either directly from your SMS inbox or from the clipboard.
The current supported cryptographic algorithms are:
Morse Code (very weak)
Rail-Fence (very weak)
Rot-13 (very weeak)
AES (very strong)
One Time Pad (Mathematically Unbreakable)
Update: Unbreakable SMS (PAID) is now free! Funny story, that - I forgot my password and couldn't issue updates to the old version anymore. Instead of making everyone buy it again, I decided to just release a free version with all of the same features as the original, plus a few extras.
* Added ICS and Gingerbread support
* Removed licensing and admob code
* Added ROT-13 cipher
* Added EULA/Updates popup
* Added 'About' menu option that contains links to wikipedia for every cipher found in this app, in case you are curious about their origins, history and functionality.
* A few other bug fixes here and there to increase performance and stability.