A triple hill cipher algorithm proposed to increase the security of encrypted binary dataand its implementation using FPGA

Encrypted binary data security is an important task in the field of data communication systems since many decades. 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. The proposed algorithm uses three stages of a modified hill cipher to make the algorithm more robust and gives high level security of the data, 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. The keys are taken from random number generator. The proposed algorithm is promising to give better security.