Short message service (SMS) is most important communication medium in many daily life applications, including healthcare monitoring, mobile banking, mobile commerce, and so on. when a SMS send an from one mobile phone(MS) to another MS (Mobile subscriber), the information contained in the SMS transmit as plain text. Sometimes this information may be confidential like account numbers, passwords, license numbers, and so on, and it is a major drawback to send such information through SMS while the

more »

... traditional SMS service does not provide encryption to the information before its transmission, However telecom service providers are ensuring at server end some security provided as Using A3,A8 and Kc algorithms, but not providing during the message transformation .In this paper, we propose an efficient and secure protocol called User End secure SMS along with integrity key check, which provides end-to-end secure communication through SMS between end users. The working of the protocol is presented by considering two different scenarios. The analysis of the proposed protocol shows that this protocol is able to prevent various attacks, including SMS disclosure, over the air modification, replay attack, man-in-themiddleattack, and impersonation attack.. The protocol completely based on the symmetric key cryptography and retains original architecture of cellular network. The simulation generated in C#.net for execution system. SMS protocol is successfully designed in order to provide end-to-end secure communication through SMS between mobile users. The analysis of the proposed protocol shows that the protocol is able to prevent various attacks. The transmission of symmetric key to the mobile users is efficiently managed by the protocol. We consider all the transmission among various Authentication Server AS(Either Same location or different location) take place by encrypting the message with a symmetric key shared between each pair of AS. This protocol produces lesser communication and computation overheads, utilizes bandwidth efficiently, and reduces message exchanged ratio during authentication than AES.