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Encryption–decryption method is the soul of cryptography, and their secrecy is not just the need of hour in modern era. In this paper, we improve the key domain maximization technique (Uniyal et al. in Int J Recent Technol Eng (IJRTE) 8(5):1385–1388 (2020), [13]) by working on the entropy parameters in cipher text. Albeit, KDMT uses a unique and eternal decomposition which is indiscriminate in the key selection inside key space, and here, a specific secondary key is used to achieve maximum entropy in the encrypted data. In the context of key secrecy, the enhanced security is justified by comparing it with LU—decomposition. |
