DONGMIN CHOI; CHEOLHEON BAEK; JIAN SHEN; ILYONG CHUNG. Secure Virtual Keypad for Smartphones against Shoulder Surfing Attacks. Research Briefs on Information and Communication Technology Evolution , [S. l.], v. 1, p. 93–101, 2015. DOI: 10.56801/rebicte.v1i.11. Disponível em: https://rebicte.org/index.php/rebicte/article/view/11. Acesso em: 10 mar. 2025.