Encrypting the communications between two mobile devices is now possible with Silent Text, an application included within Silent Circles's security pack.
Send messages and attached files in a private manner.
A simple and safe service
In particular, this tool takes care of sending encrypted messages between Android devices, by means of peer-to-peer key management. Therefore, the conversations can only be decrypted on the two terminals that take part in the process. Furthermore, with Burn Notice you can send self-destroying messages.
On the other hand, you can safely send attached files of up to 100 MB to other Silent Circle Members.