AK2R: An Aggregate-Key–Oriented Retrieval Paradigm for Ciphertext-Only Cloud Search. International Journal of Engineering Research and Science & Technology, [S. l.], v. 22, n. 1, p. 416–423, 2026. DOI: 10.62643/. Disponível em: https://ijerst.org/index.php/ijerst/article/view/1818. Acesso em: 11 nov. 2026.