On MARS's s-boxes Strength against Linear Cryptanalysis. - Carlos Javier Hernández-Castro; L. Javier García-Villalba; Julio César Hernández Castro; José María Sierra (ICCSA (3), 2003)

Remotely Telling Humans and Computers Apart: An Unsolved Problem. - Carlos Javier Hernández-Castro; Arturo Ribagorda (iNetSeC, 2009)

Side-channel attack on labeling CAPTCHAs - Carlos Javier Hernández-Castro; Arturo Ribagorda; Yago Sáez (CoRR, 2009)

Shortcomings in CAPTCHA Design and Implementation: Captcha2, a Commercial Proposal. - Carlos Javier Hernández-Castro; Jonathan D. Stainton-Ellis; Arturo Ribagorda; Julio César Hernández Castro (INC, 2010)

Side-channel Attack on the HumanAuth CAPTCHA. - Carlos Javier Hernández-Castro; Arturo Ribagorda; Yago Sáez (SECRYPT, 2010)

Pitfalls in CAPTCHA design and implementation: The Math CAPTCHA, a case study. - Carlos Javier Hernández-Castro; Arturo Ribagorda (Comput. Secur., 2010)

On the Strength of Egglue and Other Logic CAPTCHAs. - Carlos Javier Hernández-Castro; Arturo Ribagorda; Julio César Hernández Castro (SECRYPT, 2011)

Side-Channel Attack against the Capy HIP. - Carlos Javier Hernández-Castro; María Dolores Rodríguez-Moreno; David F. Barrero (EST, 2014)

A Machine Learning Attack against the Civil Rights CAPTCHA. - Carlos Javier Hernández-Castro; David F. Barrero; María Dolores Rodríguez-Moreno (IDC, 2014)

Using JPEG to Measure Image Continuity and Break Capy and Other Puzzle CAPTCHAs. - Carlos Javier Hernández-Castro; María Dolores Rodríguez-Moreno; David F. Barrero (IEEE Internet Comput., 2015)

Machine learning and empathy: the Civil Rights CAPTCHA. - Carlos Javier Hernández-Castro; David F. Barrero; María D. R.-Moreno (Concurr. Comput. Pract. Exp., 2016)

Using machine learning to identify common flaws in CAPTCHA design: FunCAPTCHA case analysis. - Carlos Javier Hernández-Castro; María D. R.-Moreno; David F. Barrero; Stuart Gibson (Comput. Secur., 2017)

An oracle-based attack on CAPTCHAs protected against oracle attacks. - Carlos Javier Hernández-Castro; María D. R.-Moreno; David F. Barrero; Shujun Li (CoRR, 2017)

All about uncertainties and traps: Statistical oracle-based attacks on a new CAPTCHA protection against oracle attacks. - Carlos Javier Hernández-Castro; Shujun Li; María D. R.-Moreno (Comput. Secur., 2020)

BASECASS: A methodology for CAPTCHAs security assurance. - Carlos Javier Hernández-Castro; David F. Barrero; María D. R.-Moreno (J. Inf. Secur. Appl., 2021)

Machine Learning and Deep Learning for Hardware Fingerprinting. - Carlos Javier Hernández-Castro (Security and Artificial Intelligence, 2022)

Adversarial Machine Learning. - Carlos Javier Hernández-Castro; Zhuoran Liu 001; Alex Serban; Ilias Tsingenopoulos; Wouter Joosen (Security and Artificial Intelligence, 2022)

Breaking CaptchaStar Using the BASECASS Methodology. - Carlos Javier Hernández-Castro; David F. Barrero; María Dolores Rodríguez-Moreno (ACM Trans. Internet Techn., 2023)