Robustness and user test on text-based CAPTCHA: Letter segmenting is not too easy or too hard
Text-based CAPTCHA is widely used as an online security guard, requiring a user to input letters for classifying human and automated software (known as a bot). However, they are still a problem for usability and robustness. This study investigated the effect of letter spacing, disturbing line orient...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
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| Series: | Array |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590005624000018 |