Human-artificial intelligence approaches for secure analysis in CAPTCHA codes. - Nghia Dinh; Lidia Ogiela (EURASIP J. Inf. Secur., 2022)

zxCAPTCHA: New Security-Enhanced CAPTCHA. - Nghia Dinh; Trung Nguyen; Vinh Truong Hoang (KST, 2023)

Augment CAPTCHA Security Using Adversarial Examples With Neural Style Transfer. - Nghia Dinh; Kiet Tran-Trung; Vinh Truong Hoang (IEEE Access, 2023)

Cognitive Blind Blockchain CAPTCHA Architecture. - Nghia Dinh; Huy Tran Tien; Viet-Tuan Le; Huu-Thanh Duong; Lidia Ogiela; Vinh Truong Hoang (AINA (4), 2024)

A Comprehensive Analysis of Cognitive CAPTCHAs Through Eye Tracking. - Nghia Dinh; Lidia Ogiela; Kiet Tran-Trung; Tuan Le-Viet; Vinh Truong Hoang (IEEE Access, 2024)

Blockchain-Enabled Verifiable Credential CAPTCHA. - Nghia Dinh; Huy Tran Tien; Lidia Ogiela; Vinh Truong Hoang; Václav Snásel (AINA (4), 2025)