Sharad Kumar Verma and Dr. D.B. Ojha
Short Message Service (SMS) is a text messaging service component of phone, Web, or mobile communication systems. It uses standardized communications protocols to allow fixed line or mobile phone devices to exchange short text messages. SMS does not have any built-in procedure to authenticate the test and offer security for the text transmitted as data, because most of the applications for mobile devices are designed and developed without taking security into consideration. In this paper, we combine two security schemes i.e. Caesar Cipher and one time pad that provide much more security for the text transmitted between different mobile phone subscribers
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