Hill Cipher and Self Repetitive Matrix for Encryption and Decryption

Archana, Ashish Vashist

Abstract


The role of cryptography in today’s era is most significant. It not only secures information mathematically by mailing massage with a key but also provides confidentiality. Hill cipher is also one of the most famous symmetric cryptosystem that can be used to protect information from unauthorized access. This paper gives us dimensions of new technique in Hill cipher, here we are developing the complex procedure of key generation for the process of encryption of message to avoid any kind of data loss. Hill cipher is a matrix based poly graphic substitution which is an additional factor. The method of generating self-repetitive matrix for Hill Cipher algorithm has been proposed. In the self-repetitive matrix generation method, the matrix used for the encryption is itself self-invertible. So, at the time of decryption, we need not to find inverse of the matrix.


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