Maheshwari, Bharat2026-10-082026-10-082020http://nits.ndl.gov.in/handle/123456789/185The growth of latest technology specially internet and its applications imposes a major concern in respect to information security in terms of protecting essential and confidential content against any possible and vital attacks. Cryptography has made the difference over the period of time by using developed encryption algorithms where some of them have successfully fulfil its designed goals, however others have failed due to specific requirements or encryption/decryption procedures have been recognized. Recent encryption algorithms employed aims mainly to escalate the security levels of sensitive information in order to deliver confidentiality, authentication, integrity, and non-repudiation. In this study, the proposed encryption algorithm has 1024 bit data block as input and combined the permutation and substitution methods for in-round encryption / decryption in-side the enhanced fiestel cipher along with pseudo randomly generated 512 bit key. Key generation and encryption / decryption performing using pseudo random number generation technique and enhanced fiestel cipher with 7 rounds methodology which removes of previous vulnerabilities. Analysis and experimental results have clearly proven solid randomness on key generation, encryption and decryption also enhanced performance and security in which it has met all desired objectives.enThesis