Haider Abbas, Dr. Malik Sikandar Hayat Khiyal, and Dr. Muhammad Daud Awan. “COMPARISON BETWEEN CRYPTOGRAPHY TECHNIQUES: A COMPREHENSIVE STUDY OF CLASSICAL, SYMMETRIC, ASYMMETRIC, HASH, AND KEYLESS CRYPTOGRAPHY”. Spectrum of Engineering Sciences, vol. 4, no. 3, Mar. 2026, pp. 5147-62, https://www.thesesjournal.com/index.php/1/article/view/3717.