Search results for "Captchas"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
182	Abram Hindle, Michael W. Godfrey, Richard C. Holt	Reverse Engineering CAPTCHAs.	WCRE	2008	DBLP DOI BibTeX RDF
146	Jeffrey P. Bigham, Anna Cavender	Evaluating existing audio CAPTCHAs and an interface optimized for non-visual use.	CHI	2009	DBLP DOI BibTeX RDF	audio captcha, non-visual interfaces, blind users
128	Monica Chew, J. D. Tygar	Collaborative Filtering CAPTCHAs.	HIP	2005	DBLP DOI BibTeX RDF
110	Elias Athanasopoulos, Spyros Antonatos	Enhanced CAPTCHAs: Using Animation to Tell Humans and Computers Apart.	Communications and Multimedia Security	2006	DBLP DOI BibTeX RDF	Laundry attacks, Web Security, CAPTCHA
110	Monica Chew, J. D. Tygar	Image Recognition CAPTCHAs.	ISC	2004	DBLP DOI BibTeX RDF
92	Chinmay Eishan Kulkarni	Assocaptcha: designing human-friendly secure captchas using word associations.	CHI Extended Abstracts	2008	DBLP DOI BibTeX RDF	visual interfaces, captcha, human-interaction-proof, word-association
92	Richard Chow, Philippe Golle, Markus Jakobsson, Lusha Wang, XiaoFeng Wang 0001	Making CAPTCHAs clickable.	HotMobile	2008	DBLP DOI BibTeX RDF	reverse Turing test, usability, mobile devices, CAPTCHA
72	Kurt Alfred Kluever, Richard Zanibbi	Balancing usability and security in a video CAPTCHA.	SOUPS	2009	DBLP DOI BibTeX RDF	Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA), tagging, human interactive proof (HIP), video understanding
72	Luis von Ahn, Manuel Blum 0001, Nicholas J. Hopper, John Langford 0001	CAPTCHA: Using Hard AI Problems for Security.	EUROCRYPT	2003	DBLP DOI BibTeX RDF
57	Aleksey Kolupaev, Juriy Ogijenko	CAPTCHAs: Humans vs. Bots.	IEEE Secur. Priv.	2008	DBLP DOI BibTeX RDF
57	Jonathan Holman, Jonathan Lazar, Jinjuan Feng, John D'Arcy	Developing usable CAPTCHAs for blind users.	ASSETS	2007	DBLP DOI BibTeX RDF	security, usability, accessibility, visual impairment, blind user, CAPTCHA, universal usability, turing test
57	Deapesh Misra, Kris Gaj	Face Recognition CAPTCHAs.	AICT/ICIW	2006	DBLP DOI BibTeX RDF
54	Jeff Yan, Ahmad Salah El Ahmad	A low-cost attack on a Microsoft captcha.	CCS	2008	DBLP DOI BibTeX RDF	segmentation attack, usability, robustness, internet security, captcha
54	Sui-Yu Wang, Jon Louis Bentley	CAPTCHA Challenge Tradeoffs: Familiarity of Strings versus Degradation of Images.	ICPR (3)	2006	DBLP DOI BibTeX RDF
54	Greg Mori, Jitendra Malik	Recognizing Objects in Adversarial Clutter: Breaking a Visual CAPTCHA.	CVPR (1)	2003	DBLP DOI BibTeX RDF
52	Henry S. Baird, Michael A. Moll, Sui-Yu Wang	ScatterType: A Legible but Hard-to-Segment CAPTCHA.	ICDAR	2005	DBLP DOI BibTeX RDF	abuse of web sites and services, human/machine discrimination, legibility of text, Gestalt perception, automatic attacks on CAPTCHAs, segmentation, fragmentation, document image analysis, CAPTCHAs, Turing tests, human interactive proofs
47	Elie Bursztein, Steven Bethard, Celine Fabry, John C. Mitchell, Daniel Jurafsky	How Good Are Humans at Solving CAPTCHAs? A Large Scale Evaluation.	IEEE Symposium on Security and Privacy	2010	DBLP DOI BibTeX RDF	image, audio, humans, captchas, mechanical turk
44	Henry S. Baird, Kris Popat	Human Interactive Proofs and Document Image Analysis.	Document Analysis Systems	2002	DBLP DOI BibTeX RDF	abuse of web sites and services, the chatroom problem, human/machine discrimination, OCR performance evaluation, legibility of text, document image analysis, CAPTCHAs, Turing tests, Human interactive proofs, document image degradations
42	Dongbin Na, Namgyu Park, Sangwoo Ji, Jong Kim 0001	CAPTCHAs Are Still in Danger: An Efficient Scheme to Bypass Adversarial CAPTCHAs.	WISA	2020	DBLP DOI BibTeX RDF
39	Anja B. Naumann, Thomas Franke, Christian Bauckhage	Investigating CAPTCHAs Based on Visual Phenomena.	INTERACT (2)	2009	DBLP DOI BibTeX RDF	visual phenomena, optical illusions, CAPTCHA
39	Jeff Yan, Ahmad Salah El Ahmad	Usability of CAPTCHAs or usability issues in CAPTCHA design.	SOUPS	2008	DBLP DOI BibTeX RDF	security, usability, CAPTCHA
39	Jeff Yan, Ahmad Salah El Ahmad	Breaking Visual CAPTCHAs with Naive Pattern Recognition Algorithms.	ACSAC	2007	DBLP DOI BibTeX RDF
39	Alf Zugenmaier	Countering Automated Exploits with System Security CAPTCHAS.	Security Protocols Workshop	2005	DBLP DOI BibTeX RDF
39	Gabriel Moy, Nathan Jones, Curt Harkless, Randall Potter	Distortion Estimation Techniques in Solving Visual CAPTCHAs.	CVPR (2)	2004	DBLP DOI BibTeX RDF
36	Manuel Egele, Leyla Bilge, Engin Kirda, Christopher Kruegel	CAPTCHA smuggling: hijacking web browsing sessions to create CAPTCHA farms.	SAC	2010	DBLP DOI BibTeX RDF	attack, CAPTCHA, security threats, real-world experiments
36	Peter Djalaliev, Muhammad Jamshed, Nicholas L. Farnan, José Carlos Brustoloni	Sentinel: Hardware-Accelerated Mitigation of Bot-Based DDoS Attacks.	ICCCN	2008	DBLP DOI BibTeX RDF
36	Ritendra Datta, Jia Li 0001, James Ze Wang	IMAGINATION: a robust image-based CAPTCHA generation system.	ACM Multimedia	2005	DBLP DOI BibTeX RDF	automated turing test, image retrieval, CAPTCHA
26	Luis von Ahn	Human computation.	DAC	2009	DBLP DOI BibTeX RDF	world wide web, online games, human computation, CAPTCHAs, games with a purpose, distributed knowledge acquisition, image labeling
26	James A. Hendler, Philipp Cimiano, Dmitri A. Dolgov, Anat Levin, Peter Mika, Brian Milch, Louis-Philippe Morency, Boris Motik, Jennifer Neville, Erik B. Sudderth, Luis von Ahn	AI's 10 to Watch.	IEEE Intell. Syst.	2008	DBLP DOI BibTeX RDF	Darpa Urban Challenge, ontologies, machine learning, information retrieval, Semantic Web, computer vision, social networks, artificial intelligence, robots, natural language processing, NLP, intelligent systems, intelligent transportation systems, computational linguistics, human computation, computational photography, Captchas, statistical relational learning, statistical relational learning, multimodal perception
26	Philippe Golle, Nicolas Ducheneaut	Preventing bots from playing online games.	Comput. Entertain.	2005	DBLP DOI BibTeX RDF	reverse Turing test, agents, games, CAPTCHAs, bots
26	Kumar Chellapilla, Kevin Larson, Patrice Y. Simard, Mary Czerwinski	Designing human friendly human interaction proofs (HIPs).	CHI	2005	DBLP DOI BibTeX RDF	completely automated public turing tests to tell computers and humans apart (CAPTCHAs), visual letter recognition, evaluation, computer vision, human perception, human interaction proofs (HIPs)
21	Nghia Dinh, Lidia Ogiela, Kiet Tran-Trung, Tuan Le-Viet, Vinh Truong Hoang	A Comprehensive Analysis of Cognitive CAPTCHAs Through Eye Tracking.	IEEE Access	2024	DBLP DOI BibTeX RDF
21	Mohammad Tanvir Parvez, Suliman A. Alsuhibany	Challenges and opportunities for Arabic CAPTCHAs.	Multim. Tools Appl.	2024	DBLP DOI BibTeX RDF
21	Ping Wang, Haichang Gao, Xiaoyan Guo, Zhongni Yuan, Jiawei Nian	Improving the Security of Audio CAPTCHAs With Adversarial Examples.	IEEE Trans. Dependable Secur. Comput.	2024	DBLP DOI BibTeX RDF
21	Zisheng Xu, Qiao Yan, F. Richard Yu, Victor C. M. Leung	A Survey of Adversarial CAPTCHAs on its History, Classification and Generation.	CoRR	2023	DBLP DOI BibTeX RDF
21	Emre Mülazimoglu, Murat Perit Çakir, Cengiz Acartürk	The Role of Visual Features in Text-Based CAPTCHAs: An fNIRS Study for Usable Security.	CoRR	2023	DBLP DOI BibTeX RDF
21	Andrew Searles, Yoshimichi Nakatsuka, Ercan Ozturk, Andrew Paverd, Gene Tsudik, Ai Enkoji	An Empirical Study & Evaluation of Modern CAPTCHAs.	CoRR	2023	DBLP DOI BibTeX RDF
21	Mukhtar Opeyemi Yusuf, Divya Srivastava, Deepak Singh, Vijaypal Singh Rathor	Multiview deep learning-based attack to break text-CAPTCHAs.	Int. J. Mach. Learn. Cybern.	2023	DBLP DOI BibTeX RDF
21	Huishuang Shao, Yurong Xia, Kai Meng, Changhao Piao	Study of Hollow Letter CAPTCHAs Recognition Technology Based on Color Filling Algorithm.	J. Inf. Process. Syst.	2023	DBLP DOI BibTeX RDF
21	Mauro Conti, Luca Pajola, Pier Paolo Tricomi	Turning captchas against humanity: Captcha-based attacks in online social media.	Online Soc. Networks Media	2023	DBLP DOI BibTeX RDF
21	Syed Faizan Hussain Shah, Syed Muhammad Ahmed Hassan Shah, Syed Sajid Ullah, Nurha Yingta	A Transparent CAPTCHAS Verification System for Cloud-Based Smart and Secure Applications.	ISC2	2023	DBLP DOI BibTeX RDF
21	Andrew Searles, Yoshimichi Nakatsuka, Ercan Ozturk, Andrew Paverd, Gene Tsudik, Ai Enkoji	An Empirical Study & Evaluation of Modern CAPTCHAs.	USENIX Security Symposium	2023	DBLP BibTeX RDF
21	Hadi Abdullah, Aditya Karlekar, Saurabh Prasad, Muhammad Sajidur Rahman, Logan Blue, Luke A. Bauer, Vincent Bindschaedler, Patrick Traynor	Attacks as Defenses: Designing Robust Audio CAPTCHAs Using Attacks on Automatic Speech Recognition Systems.	NDSS	2023	DBLP BibTeX RDF
21	Yucheng Fu, Guoheng Sun, Han Yang, Juntian Huang, Haizhou Wang	Fighting Attacks on Large Character Set CAPTCHAs Using Transferable Adversarial Examples.	IJCNN	2023	DBLP DOI BibTeX RDF
21	Ruijie Zhao 0001, Xianwen Deng, Yanhao Wang, Zhicong Yan, Zhengguang Han, Libo Chen, Zhi Xue, Yijun Wang	GeeSolver: A Generic, Efficient, and Effortless Solver with Self-Supervised Learning for Breaking Text Captchas.	SP	2023	DBLP DOI BibTeX RDF
21	Suliman A. Alsuhibany, Mohammad Tanvir Parvez	Attack-filtered interactive arabic CAPTCHAs.	J. Inf. Secur. Appl.	2022	DBLP DOI BibTeX RDF
21	Jiawei Nian, Ping Wang, Haichang Gao, Xiaoyan Guo	A deep learning-based attack on text CAPTCHAs by using object detection techniques.	IET Inf. Secur.	2022	DBLP DOI BibTeX RDF
21	P. L. Chithra, K. Sathya	CAPTCHAs against meddler image identification based on a convolutional neural network.	Multim. Tools Appl.	2022	DBLP DOI BibTeX RDF
21	Chenghui Shi, Xiaogang Xu, Shouling Ji, Kai Bu, Jianhai Chen, Raheem Beyah, Ting Wang 0006	Adversarial CAPTCHAs.	IEEE Trans. Cybern.	2022	DBLP DOI BibTeX RDF
21	Mauro Conti, Luca Pajola, Pier Paolo Tricomi	Captcha Attack: Turning Captchas Against Humanity.	CoRR	2022	DBLP BibTeX RDF
21	Hadi Abdullah, Aditya Karlekar, Saurabh Prasad, Muhammad Sajidur Rahman, Logan Blue, Luke A. Bauer, Vincent Bindschaedler, Patrick Traynor	Attacks as Defenses: Designing Robust Audio CAPTCHAs Using Attacks on Automatic Speech Recognition Systems.	CoRR	2022	DBLP DOI BibTeX RDF
21	Hannah Marie Maurstad Eriksen, Lars Hoel, Caroline Sofie Jetteberg, Amalie Christine Leiknes, Frode Eika Sandnes	Can't You Tell I am a Human? A Comparison of Common Text and Image CAPTCHAs Using a Low-Fidelity Methodology.	DSAI	2022	DBLP DOI BibTeX RDF
21	David Holm Audran, Marcus Braunschweig Andersen, Mark Højer Hansen, Mikkel Møller Andersen, Thomas B. Frederiksen, Kasper H. Hansen, Dimitrios Georgoulias, Emmanouil Vasilomanolakis	Tick Tock Break the Clock: Breaking CAPTCHAs on the Darkweb.	SECRYPT	2022	DBLP DOI BibTeX RDF
21	Rulin Shao, Zhouxing Shi, Jinfeng Yi, Pin-Yu Chen, Cho-Jui Hsieh	Robust Text CAPTCHAs Using Adversarial Examples.	IEEE Big Data	2022	DBLP DOI BibTeX RDF
21	Xinyao Ma, Zaiqiao Ye, Sameer Patil	Do Regional Variations Affect the CAPTCHA User Experience? A Comparison of CAPTCHAs in China and the United States.	ASE	2022	DBLP DOI BibTeX RDF
21	Matthew Moore, Kristen R. Walcott	Generating Human-Like Motion to Defeat Interaction-Based CAPTCHAs.	FTC (2)	2022	DBLP DOI BibTeX RDF
21	Xianwen Deng, Ruijie Zhao 0001, Yanhao Wang, Libo Chen, Yijun Wang, Zhi Xue	3E-Solver: An Effortless, Easy-to-Update, and End-to-End Solver with Semi-Supervised Learning for Breaking Text-Based Captchas.	IJCAI	2022	DBLP DOI BibTeX RDF
21	Ondrej Bostik, Karel Horák 0001, Lukas Kratochvila, Tomás Zemcík, Simon Bilik	Semi-supervised deep learning approach to break common CAPTCHAs.	Neural Comput. Appl.	2021	DBLP DOI BibTeX RDF
21	Carlos Javier Hernández-Castro, David F. Barrero, María D. R.-Moreno	BASECASS: A methodology for CAPTCHAs security assurance.	J. Inf. Secur. Appl.	2021	DBLP DOI BibTeX RDF
21	Mohinder Kumar, Manish Kumar Jindal, Munish Kumar	A Novel Attack on Monochrome and Greyscale Devanagari CAPTCHAs.	ACM Trans. Asian Low Resour. Lang. Inf. Process.	2021	DBLP DOI BibTeX RDF
21	Suliman A. Alsuhibany, Latifah A. Alreshoodi	Detecting human attacks on text-based CAPTCHAs using the keystroke dynamic approach.	IET Inf. Secur.	2021	DBLP DOI BibTeX RDF
21	Yao Wang, Yuliang Wei, Mingjin Zhang, Yang Liu, Bailing Wang	Make complex CAPTCHAs simple: A fast text captcha solver based on a small number of samples.	Inf. Sci.	2021	DBLP DOI BibTeX RDF
21	Sanela Arsic, Djordje Nikolic, Milena Jevtic	An investigation of the usability of image-based CAPTCHAs using PROMETHEE-GAIA method.	Multim. Tools Appl.	2021	DBLP DOI BibTeX RDF
21	Chunhui Li, Xingshu Chen, Haizhou Wang, Peiming Wang, Yu Zhang, Wenxian Wang	End-to-end attack on text-based CAPTCHAs based on cycle-consistent generative adversarial network.	Neurocomputing	2021	DBLP DOI BibTeX RDF
21	Jiaming Zhang 0006, Jitao Sang, Kaiyuan Xu, Shangxi Wu, Xian Zhao, Yanfeng Sun, Yongli Hu, Jian Yu	Robust CAPTCHAs Towards Malicious OCR.	IEEE Trans. Multim.	2021	DBLP DOI BibTeX RDF
21	Rulin Shao, Zhouxing Shi, Jinfeng Yi, Pin-Yu Chen, Cho-Jui Hsieh	Robust Text CAPTCHAs Using Adversarial Examples.	CoRR	2021	DBLP BibTeX RDF
21	Emre Mülazimoglu, Murat Perit Çakir, Cengiz Acartürk	The Role of Visual Features in Text-Based CAPTCHAs: An fNIRS Study for Usable Security.	Comput. Intell. Neurosci.	2021	DBLP DOI BibTeX RDF
21	Ping Wang, Haichang Gao, Qingxun Rao, Sainan Luo, Zhongni Yuan, Ziyu Shi	A Security Analysis of Captchas With Large Character Sets.	IEEE Trans. Dependable Secur. Comput.	2021	DBLP DOI BibTeX RDF
21	Zhuohao Zhang 0001, Zhilin Zhang, Haolin Yuan, Natã M. Barbosa, Sauvik Das, Yang Wang 0005	WebAlly: Making Visual Task-based CAPTCHAs Transferable for People with Visual Impairments.	SOUPS @ USENIX Security Symposium	2021	DBLP BibTeX RDF
21	Xianwen Deng, Ruijie Zhao 0001, Zhi Xue, Ming Liu, Libo Chen, Yijun Wang	A Semi-supervised Deep Learning-Based Solver for Breaking Text-Based CAPTCHAs.	TrustCom	2021	DBLP DOI BibTeX RDF
21	Guixin Ye, Zhanyong Tang, Dingyi Fang, Zhanxing Zhu, Yansong Feng, Pengfei Xu 0003, Xiaojiang Chen, Jungong Han, Zheng Wang 0001	Using Generative Adversarial Networks to Break and Protect Text Captchas.	ACM Trans. Priv. Secur.	2020	DBLP DOI BibTeX RDF
21	Tam V. Nguyen 0002, Zhe Huang 0008, Saiteja Bethini, Venkata Sai Prasanth Ippagunta, Phu H. Phung	Secure Captchas via Object Segment Collages.	IEEE Access	2020	DBLP DOI BibTeX RDF
21	Chunhui Li, Xingshu Chen, Haizhou Wang, Yu Zhang, Peiming Wang	An End-to-End Attack on Text-based CAPTCHAs Based on Cycle-Consistent Generative Adversarial Network.	CoRR	2020	DBLP BibTeX RDF
21	Yang Zi, Haichang Gao, Zhouhang Cheng, Yi Liu 0042	An End-to-End Attack on Text CAPTCHAs.	IEEE Trans. Inf. Forensics Secur.	2020	DBLP DOI BibTeX RDF
21	Sheng Tian, Tao Xiong	A Generic Solver Combining Unsupervised Learning and Representation Learning for Breaking Text-Based Captchas.	WWW	2020	DBLP DOI BibTeX RDF
21	Rudy Berton, Ombretta Gaggi, Agnieszka Kolasinska, Claudio Enrico Palazzi, Giacomo Quadrio	Are CAPTCHAs preventing robotic intrusion or accessibility for impaired users?	CCNC	2020	DBLP DOI BibTeX RDF
21	Philip Kirkbride, M. Ali Akber Dewan, Fuhua Lin	Game-Like Captchas for Intrusion Detection.	DASC/PiCom/CBDCom/CyberSciTech	2020	DBLP DOI BibTeX RDF
21	Zhouhang Cheng, Haichang Gao, Zhongyu Liu, Huaxi Wu, Yang Zi, Ge Pei	Image-based CAPTCHAs based on neural style transfer.	IET Inf. Secur.	2019	DBLP DOI BibTeX RDF
21	Xiyang Liu, Yang Zhang, Jing Hu, Mengyun Tang, Haichang Gao	Breaking Text-based CAPTCHAs using Average Vertical Partition.	J. Inf. Sci. Eng.	2019	DBLP BibTeX RDF
21	Haiqin Weng, Binbin Zhao, Shouling Ji, Jianhai Chen, Ting Wang 0006, Qinming He, Raheem Beyah	Towards understanding the security of modern image captchas and underground captcha-solving services.	Big Data Min. Anal.	2019	DBLP DOI BibTeX RDF
21	Chenghui Shi, Xiaogang Xu, Shouling Ji, Kai Bu, Jianhai Chen, Raheem A. Beyah, Ting Wang 0006	Adversarial CAPTCHAs.	CoRR	2019	DBLP BibTeX RDF
21	Xing Wu 0001, Shuji Dai, Yike Guo, Hamido Fujita	A machine learning attack against variable-length Chinese character CAPTCHAs.	Appl. Intell.	2019	DBLP DOI BibTeX RDF
21	Simon S. Woo	Design and evaluation of 3D CAPTCHAs.	Comput. Secur.	2019	DBLP DOI BibTeX RDF
21	Song Gao 0010, Manar Mohamed, Nitesh Saxena, Chengcui Zhang	Emerging-Image Motion CAPTCHAs: Vulnerabilities of Existing Designs, and Countermeasures.	IEEE Trans. Dependable Secur. Comput.	2019	DBLP DOI BibTeX RDF
21	Yueyao Chen, Qianjun Liu, Tianyu Du, Yuan Chen, Shouling Ji	Symmetric Frame Cracking: A Powerful Dynamic Textual CAPTCHAs Cracking Policy.	Inscrypt	2019	DBLP DOI BibTeX RDF
21	Tomoka Azakami, Chihiro Shibata, Ryuya Uda	Evaluation of Ergonomically Designed CAPTCHAs using Deep Learning Technology.	J. Inf. Process.	2018	DBLP DOI BibTeX RDF
21	Mengyun Tang, Haichang Gao, Yang Zhang, Yi Liu 0042, Ping Zhang, Ping Wang	Research on Deep Learning Techniques in Breaking Text-Based Captchas and Designing Image-Based Captcha.	IEEE Trans. Inf. Forensics Secur.	2018	DBLP DOI BibTeX RDF
21	David Lorenzi, Emre Uzun, Jaideep Vaidya, Shamik Sural, Vijayalakshmi Atluri	Towards designing robust CAPTCHAs.	J. Comput. Secur.	2018	DBLP DOI BibTeX RDF
21	Binbin Zhao, Haiqin Weng, Shouling Ji, Jianhai Chen, Ting Wang 0006, Qinming He, Reheem Beyah	Towards Evaluating the Security of Real-World Deployed Image CAPTCHAs.	AISec@CCS	2018	DBLP DOI BibTeX RDF
21	William Aiken, Hyoungshick Kim	POSTER: DeepCRACk: Using Deep Learning to Automatically CRack Audio CAPTCHAs.	AsiaCCS	2018	DBLP DOI BibTeX RDF
21	Ajeet Singh, Vikas Tiwari, Appala Naidu Tentu	A Machine Vision Attack Model on Image Based CAPTCHAs Challenge: Large Scale Evaluation.	SPACE	2018	DBLP DOI BibTeX RDF
21	Radmila Jankovic, Alessia Amelio	Usability of Puzzle and Gesture-Based CAPTCHAs on Smartphones via Statistical Analysis.	IISA	2018	DBLP DOI BibTeX RDF
21	Adil Ahmad, Faizan Ahmad, Lei Wei, Vinod Yegneswaran, Fareed Zaffar	Detecting and Defending Against Certificate Attacks with Origin-Bound CAPTCHAs.	SecureComm (2)	2018	DBLP DOI BibTeX RDF
21	Sangeeta Mittal, Prashant Kaushik, Saquib Nadeem Hashmi, Kaushtubh Kumar	Robust Real Time Breaking of Image CAPTCHAs Using Inception v3 Model.	IC3	2018	DBLP DOI BibTeX RDF
21	Michihiro Yamada, Riko Shigeno, Hiroaki Kikuchi, Maki Sakamoto	Evaluation and Development of Onomatopoeia CAPTCHAs.	PST	2018	DBLP DOI BibTeX RDF
21	Abdalnaser Algwil	Security and usability of cross-device captchas.		2018	RDF
21	Hendrik Meutzner, Santosh Gupta, Viet-Hung Nguyen, Thorsten Holz, Dorothea Kolossa	Toward Improved Audio CAPTCHAs Based on Auditory Perception and Language Understanding.	ACM Trans. Priv. Secur.	2017	DBLP DOI BibTeX RDF
21	Maria De Marsico, Luca Marchionni, Andrea Novelli, Michael Oertel	FATCHA: biometrics lends tools for CAPTCHAs.	Multim. Tools Appl.	2017	DBLP DOI BibTeX RDF
21	Rafaqat Hussain, Hui Gao, Riaz Ahmed Shaikh 0002	Segmentation of connected characters in text-based CAPTCHAs for intelligent character recognition.	Multim. Tools Appl.	2017	DBLP DOI BibTeX RDF
21	Carlos Javier Hernández-Castro, María D. R.-Moreno, David F. Barrero, Shujun Li	An oracle-based attack on CAPTCHAs protected against oracle attacks.	CoRR	2017	DBLP BibTeX RDF