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The protection of sensitive data from illegitimate users is one of the main challenges in today’s technological era. To handle prevailing security-related problems and challenges amicably, cryptographic techniques are applied for the fortification of data. State-of-the-art cryptographic ciphers generally use substitution-boxes (S-boxes) that help in accomplishing robust sanctuary of data. Provision of data security by a cipher is proportionate directly to the cryptographic strength of an S-box employed in the respective cipher. This research paper proposes to project a simple and innovative scheme for the generation of dynamic S-boxes by employing a novel cubic modular transformation along with the trigonometric sine function. A pioneering optimization phase, dynamic in nature, is also suggested that improvises the nonlinearity of the initial configuration of S-box. The overall proposed scheme possesses the potential to …