Cryptography on Android Message Applications - A Review

Short Message Service (SMS) is a text messaging service component of phone, web, or mobile communication systems, using standardized communications protocols that allow the exchange of short text messages between fixed line or mobile phone devices. Security of SMS's is still an open challenging task. Various Cryptographic algorithms have been applied to secure the mobile SMS. The success of any cryptography technique depends on various factors like complexity, time, memory requirement, cost etc. In this paper we survey the most common and widely used SMS Encryption techniques. Each has its own advantages and disadvantages. Recent trends on Cryptography on android message applications have also been discussed. The latest cryptographic algorithm is based on lookup table and dynamic key which is easy to implement and to use and improve the efficiency. In this paper, an improvement in lookup table and dynamic algorithm is proposed. Rather than using the Static Lookup Table, Dynamic Lookup Table may be used which will improve the overall efficiency.

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