New Secure and Advanced Algorithm for Stream Ciphers Extended RC4 and FPGA Implementation

RC4 is the most widely used stream ciphers uses in cryptography. A lot of modifications of RC4 cipher can be seen in open literature. This paper mainly analysis and describe the design issue of stream ciphers in Network security and proposes a variation in the algorithm which increases the efficiency of the algorithm. The performance evaluation of the stream cipher is done in comparison with present stream ciphers. The focus is to generate a long unpredictable key stream with better performance, which can be used for cryptographic applications.