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- URN zum Zitieren dieses Dokuments:
- urn:nbn:de:bvb:355-epub-335707
- DOI zum Zitieren dieses Dokuments:
- 10.5283/epub.33570
Zusammenfassung
CAPTCHAs are challenge-response tests that aim at preventing unwanted machines, including bots, from accessing web services while providing easy access for humans. Recent advances in artificial-intelligence based attacks show that the level of security provided by many state-of-the-art text-based CAPTCHAs is declining. At the same time, techniques for distorting and obscuring the text, which are ...
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