| Pitfalls in CAPTCHA design and implementation: The Math CAPTCHA, a case study CJ Hernandez-Castro, A Ribagorda computers & security 29 (1), 141-157, 2010 | 84 | 2010 |
| Using JPEG to measure image continuity and break capy and other puzzle CAPTCHAs CJ Hernandez-Castro, MD R-Moreno, DF Barrero IEEE Internet Computing 19 (6), 46-53, 2015 | 25 | 2015 |
| A first step towards automatic hoax detection JC Hernandez, CJ Hernández, JM Sierra, A Ribagorda Proceedings. 36th Annual 2002 International Carnahan Conference on Security …, 2002 | 18 | 2002 |
| Side-channel attack on the HumanAuth CAPTCHA CJ Hernandez-Castro, A Ribagorda, Y Saez 2010 International Conference on Security and Cryptography (SECRYPT), 1-7, 2010 | 17 | 2010 |
| Side-channel attack on labeling captchas CJ Hernandez-Castro, A Ribagorda, Y Saez arXiv preprint arXiv:0908.1185, 2009 | 17 | 2009 |
| Adversarial machine learning CJ Hernández-Castro, Z Liu, A Serban, I Tsingenopoulos, W Joosen Security and Artificial Intelligence: A Crossdisciplinary Approach, 287-312, 2022 | 11 | 2022 |
| Using machine learning to identify common flaws in CAPTCHA design: FunCAPTCHA case analysis CJ Hernández-Castro, MD R-Moreno, DF Barrero, S Gibson Computers & Security 70, 744-756, 2017 | 11 | 2017 |
| Remotely telling humans and computers apart: An unsolved problem CJ Hernandez-Castro, A Ribagorda iNetSec 2009–Open Research Problems in Network Security: IFIP WG 11.4 …, 2009 | 11 | 2009 |
| Side-channel attack against the Capy HIP CJ Hernández-Castro, MD R-Moreno, DF Barrero 2014 Fifth International Conference on Emerging Security Technologies, 99-104, 2014 | 10 | 2014 |
| All about uncertainties and traps: Statistical oracle-based attacks on a new CAPTCHA protection against oracle attacks CJ Hernández-Castro, S Li, MD R-Moreno Computers & Security 92, 101758, 2020 | 6 | 2020 |
| A Machine Learning Attack against the Civil Rights CAPTCHA CJ Hernández-Castro, DF Barrero, MD R-Moreno Intelligent Distributed Computing VIII, 239-248, 2015 | 6 | 2015 |
| On the strength of egglue and other logic captchas CJ Hernandez-Castro, A Ribagorda, JC Hernandez-Castro Security and Cryptography (SECRYPT), 2011 Proceedings of the International …, 2011 | 4 | 2011 |
| Compulsive voting JC Hernandez, JM Sierra, CJ Hernandez, A Ribagorda Proceedings. 36th Annual 2002 International Carnahan Conference on Security …, 2002 | 4 | 2002 |
| Breaking CaptchaStar using the BASECASS methodology C Hernández-Castro, DF Barrero, MD R-Moreno ACM Transactions on Internet Technology 23 (1), 1-12, 2023 | 3 | 2023 |
| BASECASS: A methodology for CAPTCHAs security assurance CJ Hernández-Castro, DF Barrero, MD R-Moreno Journal of Information Security and Applications 63, 103018, 2021 | 3 | 2021 |
| Where do CAPTCHAs fail: A study in common pitfalls in CAPTCHA design and how to avoid them CJ Hernández Castro | 3 | 2017 |
| VideoCAPTCHAs CJ Hernandez-Castro, A Ribagorda Proceedings of the 5th International Conference on Security and Protection …, 2009 | 3 | 2009 |
| An oracle-based attack on CAPTCHAs protected against oracle attacks CJ Hernández-Castro, DF Barrero, S Li arXiv preprint arXiv:1702.03815, 2017 | 2 | 2017 |
| Machine learning and empathy: the Civil Rights CAPTCHA CJ Hernández‐Castro, DF Barrero, MD R‐Moreno Concurrency and Computation: Practice and Experience 28 (4), 1310-1323, 2016 | 2 | 2016 |
| Shortcomings in CAPTCHA design and implementation: Captcha2, a commercial proposal JCHC Carlos Javier Hernandez-Castro, Jonathan D Eight International Network Conference INC 2010, 159-168, 2010 | 2* | 2010 |
