Text Compression and Encryption through Smart Devices for Mobile Communication

Today\´s life of e-citizens relies more and more on the "always-on" paradigm. This transformed our lives in a way that it is difficult, and sometimes impossible, to deal with day-by-day activities without being \´connected". The technology that enable an individual to take advantage, in the best way, of the Ubiquitous Computing paradigm is the Mobile Computing Communication that is fostered by the wide adoption of smart devices such as mobile phone, smartphones, tablets and so on. In this work we investigate the possibility of reliably sending a small file via Short Message Service (SMS) by using data compression for a more effective mobile data exchange in which basic GSM is the only available data communication option. We present an application for portable devices, called Smart Text Compression and Encryption for Short Message Service (STCESMS), based on Google Android OS that can compress and/or encrypt a file or generic message and send it via SMS, according to different strategies properly influenced by the containment of delivery cost or energy consumption objectives. STCESMS also provides encryption services, implemented by using the Data Encryption Standard, after the compression process.