![](https://dblp.org/img/logo.ua.320x120.png)
![](https://dblp.org/img/dropdown.dark.16x16.png)
![](https://dblp.org/img/peace.dark.16x16.png)
Остановите войну!
for scientists:
![search dblp search dblp](https://dblp.org/img/search.dark.16x16.png)
![search dblp](https://dblp.org/img/search.dark.16x16.png)
default search action
"Pitfalls in CAPTCHA design and implementation: The Math CAPTCHA, a case study."
Carlos Javier Hernández-Castro, Arturo Ribagorda (2010)
- Carlos Javier Hernández-Castro, Arturo Ribagorda:
Pitfalls in CAPTCHA design and implementation: The Math CAPTCHA, a case study. Comput. Secur. 29(1): 141-157 (2010)
![](https://dblp.org/img/cog.dark.24x24.png)
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.