Image encryption using enhanced DCT transform for frequency domain applications Bande Ganesh, Davanam Ganesh, M. Sunil Kumar, Pasupula Rishitha, P. Sri Vidya Devi and Balpreet Singh MATEC Web Conf., 392 (2024) 01121 Published online: 18 March 2024 DOI: 10.1051/matecconf/202439201121