Android smartphone is certainly no stranger to the public and of course has spread widely to the world. Android smartphone has many applications in it and also has the function of each of these applications. One application that is commonly used is sending SMS, which functions as sending and receiving data quickly. SMS is a text message that at the time of sending has been limited and set its size, the size limit is 160 characters per SMS. But every use and use of SMS is certainly subject to shipping fees that have been determined from the operator. With this, security is one of the most important aspects to maintain the confidentiality and authenticity of the SMS messages so that they avoid being tapped, stolen or irresponsible. So it is very necessary to apply security in this SMS application that uses cryptographic DES (Data Encryption Standard) algorithm so that messages sent to their destinations can be kept confidential and authentic
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.