The End is Nigh Generic Solving of Text-based Elie Bursztein, Jonathan Aigrain, Angelika Mosciki, John Mitchell \
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Baidu (2011) Baidu (2013) CNN eBay Real world Captchas ReCaptcha (2011) ReCaptcha (2013) Wikipedia Yahoo https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Outline https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Outline Old approach: segment then recognize https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Outline Old approach: segment then recognize Our new approach: single machine learning step https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Outline Old approach: segment then recognize Our new approach: single machine learning step Evaluation: efficiency on real world captchas https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Segment then recognize How to break captchas the old way \
Think lego https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Slashdot captcha https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation Post- segmentation https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation Post- segmentation https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation Post- segmentation Recognition https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation Post- segmentation f a e t e s t Recognition https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation Post- segmentation f a e t e s t Recognition Post-recognition https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
The segment then recognize approach Preprocessing Segmentation Post- segmentation f a e t e s t Recognition f a s t e s t Post-recognition https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Baidu (2011) Baidu (2013) CNN eBay How about collapsing? ReCaptcha (2011) ReCaptcha (2013) Wikipedia Yahoo https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Figure 7. Detecting characters with a cross shape (the ad hoc/complicated heuristics Figure 8. S Vertical Histogram. Identification o ” shape. Figure 13(b) shows a segmentation result. (a) (b) The Robustness of Google CAPTCHAs Ahmad S El Ahmad, Jeff Yan, Mohamad Tayara https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
I don’t know how to do it (in the general case) Elie Bursztein Confidential Captcha (in)security
Captcha breaking reloaded When AI over-come human limitations \
What is wrong with the previous approach? https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
What is wrong with the previous approach? Segmentation requires to find an invariant to exploit color, cluster size, number of characters, shape ... https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
What is wrong with the previous approach? Segmentation requires to find an invariant to exploit color, cluster size, number of characters, shape ... https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
What is wrong with the previous approach? Segmentation requires to find an invariant to exploit color, cluster size, number of characters, shape ... Captcha breaking is more exploit writing than machine learning https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Classifiers are extremely accuracy (e.g KNN/SVM) 100% 90% 80% 70% % success 60% 50% 09 40% AZ09 azAZ09 30% Distortion 20% 3 fonts 5 fonts 10% Angles 0% 10 20 50 100 200 500 Trainning set size https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
If classifiers are that good, why are we doing pre-processing ? https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
There is no segmentation https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Approach overview Cut-points detection https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Approach overview Cut-points detection Slicer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Approach overview Cut-points detection Slicer Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Approach overview Cut-points detection Slicer Scorer Arbiter https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
New approach Captcha https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
New approach Captcha Slicer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
New approach Captcha Slicer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Scorer https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Arbiter https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Arbiter ilebe https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Arbiter ilebe kinedi https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Arbiter ilebe kinedi ilebe https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
Arbiter ilebe kinedi ilebe ilebe https://www.elie.net/tag/captcha Elie Bursztein The End is Nigh: Generic Solving of Text-based CAPTCHAs
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