SecureTrans is a server-based module that provides the ability to send secure SMS. Messages are encrypted when sent to recipients and can only be retrieved with the correct password sent from their cell phone (caller id is used). This ensures that only the targeted recipient can read the message and eliminates non-repudiation problems, as the sender will be notified of successful decryption. The application is carrier and phone independent, and does not require the need for modification to SIM cards. In addition, encrypted messages may be sent inside multi-media messaging service (MMS) pictures, using steganography techniques. An image of a person can be used to verify an identity, while at the same time embedded content in the image can be used to transmit information.