SINGHAL, Vikas; SINGH, Devendra; GUPTA, Sanjai. Literature Review on Improving Data Security using DES and DCT. International Journal of Computer Sciences and Engineering, [S. l.], v. 9, n. 7, p. 78–83, 2021. DOI: 10.26438/ijcse/v9i7.7883. Disponível em: https://ijcse.isroset.org/index.php/j/article/view/6315. Acesso em: 2 feb. 2026.