Randomized Matrix-based Double-Key Cryptographic System

Cryptography plays an important role in information security and in secure communication, which defines the security of a particular system. Many modern cryptographic algorithms exist today however they face difficulties in uniform implementation. In addition, different types of cryptographic techniques target different types of text lengths for encryption. Ancient Indian literature has many robust encoding schemes which include Siri Bhoovalaya, Ekakshara Kosha, and Mlecchita Vikalpa. This research work presents a Randomized Matrix-based Double-key Cryptographic System (RMDCS) to encode small to large amounts of information in a matrix. This work is inspired by matrix-based encryption used in one of the ancient Indian techniques called "Siri Bhoovalaya" RMDCS aims to bring forth a modern cryptographic technique that coalesced a randomized matrix approach with Caesar cipher. RMDCS intends to achieve one-time padding by generating a unique key every time while encrypting the same text.