On the security and usability of dynamic cognitive game CAPTCHAs

@article{Mohamed2017OnTS,
  title={On the security and usability of dynamic cognitive game CAPTCHAs},
  author={Manar Mohamed and Song Gao and Niharika Sachdeva and Nitesh Saxena and Chengcui Zhang and Ponnurangam Kumaraguru and Paul C. van Oorschot},
  journal={J. Comput. Secur.},
  year={2017},
  volume={25},
  pages={205-230}
}
Existing CAPTCHA solutions are a major source of user frustration on the Internet today, frequently forcing companies to lose customers and business. Game CAPTCHAs are a promising approach which may make CAPTCHA solving a fun activity for the user. One category of such CAPTCHAs – called Dynamic Cognitive Game (DCG) CAPTCHA – challenges the user to perform a game-like cognitive (or recognition) task interacting with a series of dynamic images. Specifically, it takes the form of many objects… 

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References

SHOWING 1-10 OF 41 REFERENCES

A three-way investigation of a game-CAPTCHA: automated attacks, relay attacks and usability

This work formalize, design and implement a representative category of DCG captchas, and dissect them across: (1) fully automated attacks, (2) human-solver relay attacks, and (3) usability.

Dynamic Cognitive Game CAPTCHA Usability and Detection of Streaming-Based Farming

DCG CAPTCHAs appear to be one of the first CAPTCHA schemes that enable reliable detection of relay attacks, and a mechanism for detecting such a streaming-enabled game captcha farming based on real- time game statistics, fed to machine learning detection algorithms.

Gaming the game: Defeating a game captcha with efficient and robust hybrid attacks

A new DCG object tracking algorithm is designed, based on color code histogram, and it is shown that it is simpler, more efficient and more robust compared to several known tracking approaches.

The Usability of Captchas on Mobile Devices

This research developed, refined and tested a set of domain specific heuristics to evaluate captcha schemes on smartphones, and identified design strategies for the development of new captcha schemes for smartphones.

CAPTCHA smuggling: hijacking web browsing sessions to create CAPTCHA farms

A key point of this attack is that the CAPTCHAs are surreptitiously injected into interactions with benign web applications, and are perceived as a normal part of the application and raise no suspicion.

Implicit CAPTCHAs

A design methodology for "implicit" CAPTCHAs is proposed to relieve drawbacks of present technology and shows how these tests can be woven into the expected sequence of browsing using cues tailored to the site.

Collage CAPTCHA

A method has been presented for telling the human users and computer softwares apart on the basis of choice of an object shown on the screen, implemented by the Java programming language.

Security and Usability Challenges of Moving-Object CAPTCHAs: Decoding Codewords in Motion

This work presents an attack that defeats instances of such a captcha (NuCaptcha) representing the state-of-the-art, involving dynamic text strings called codewords, and considers design modifications to mitigate the attacks (e.g., overlapping characters more closely).

A low-cost attack on a Microsoft captcha

It is shown that CAPTCHAs that are carefully designed to be segmentation-resistant are vulnerable to novel but simple attacks, including the schemes designed and deployed by Microsoft, Yahoo and Google.

Online Collage CAPTCHA

A method for telling the human users and computer softwares apart on the basis of choice of an object shown on the screen and the main advantage of this method is its simplicity because the user does not have to type anything.