CAPTCHA: Attacks and Weaknesses against OCR technology

1
Silky Azad
Silky Azad
2
Kiran Jain
Kiran Jain
1 Kurukshetra University, Kurukshetra.

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GJCST Volume 13 Issue D3

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The basic challenge in designing these obfuscating CAPTCHAs is to make them easy enough that users are not dissuaded from attempting a solution, yet still too difficult to solve using available computer vision algorithms. As Modern technology grows this gap however becomes thinner and thinner. It is possible to enhance the security of an existing text CAPTCHA by system-apically adding noise and distortion, and arranging characters more tightly. These measures, however, would also make the characters harder for humans to recognize, resulting in a higher error rates and higher Network load .This paper presents few of most active attacks on text CAPTCHAs existing today.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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Not applicable for this article.

Silky Azad. 2013. \u201cCAPTCHA: Attacks and Weaknesses against OCR technology\u201d. Global Journal of Computer Science and Technology - D: Neural & AI GJCST-D Volume 13 (GJCST Volume 13 Issue D3): .

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GJCST Volume 13 Issue D3
Pg. 15- 17
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Crossref Journal DOI 10.17406/gjcst

Print ISSN 0975-4350

e-ISSN 0975-4172

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v1.2

Issue date

May 31, 2013

Language

English

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CAPTCHA: Attacks and Weaknesses against OCR technology

Silky Azad
Silky Azad Kurukshetra University, Kurukshetra.
Kiran Jain
Kiran Jain

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