A new cryptosystem based on an enhanced Vigenere cipher incorporating large SBoxes Abdelhakim Chemlal, Hassan Tabti, Hamid El Bourakkadi, Abdellah Abid, Abdellatif Jarjar and Abdelhamid Benazzi E3S Web Conf., 601 (2025) 00002 Published online: 16 January 2025 DOI: 10.1051/e3sconf/202560100002