SMS Security with RC4 Algorithm on Android OS

hort Message Service (SMS) is a textmessaging service component of mobilecommunication systems. It uses standardizedcommunications protocols to exchange short textbetween mobile devices. SMS does not have anybuilt-in procedure to offer security for the texttransmitted as data. Most of the applications formobile devices are designed and developed withouttaking security into consideration. In practical use,SMS messages are not encrypted by default duringtransmission. Confidentiality is the concept ofensuring that data is not made available or disclosedto unauthorized people. Confidentially is achievedthrough encryption. Both symmetric and asymmetricencryption can be used. Confidentiality was theoriginal purpose of cryptography. Therefore, SMSSecurity on Android will be developed in the paper. Itincludes SMS network architecture andcryptographic protocols as theory background