Proposed triple hill cipher algorithm for increasing the security level of encrypted binary data and its implementation using FPGA

Nowadays security becomes an important feature with the growth of electronic communication systems. In this paper, we study the security problem and present a proposed triple hill cipher algorithm and its implementation on FPGA to encrypt any binary data such as images, audio, video... etc. This proposed algorithm uses three stages of a modified hill cipher to make the algorithm more robust, each stage is considered a block cipher with a block length of 128 bits and key length of 256 bits. The message to be encrypted is processed by this block cipher in three stages to increase the security. The keys are taken from random number generator. The proposed algorithm is promising to give better security.