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Luca Barbera
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72 followers
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Luca's posts

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this is going to be big, and you'll hear it. a. lot.

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Dustbin is back... and it's 1987 again!

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Trololol 800%. Cosa chiedere di più.

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let's create a circular paradox.

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come era prevedibile, usare un Chromebook e' una esperienza limitante e lascia molto a desiderare.

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e mentre tutti ciarlano, lo stato del Minnesota e' fallito.

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la tecnologia ben fatta sta diventando un lusso.
How not to design a CAPTCHA

Unfortunately Sony missed the entire point of a CAPTCHA. Instead of using an obfuscated image which is difficult for computers to recognize the characters, they include the CAPTCHA's unobfuscated characters in HTML and use CSS and JavaScript to make the characters appear slightly distorted.

While taking a Digital Image and Video Processing class (EE 371R at utexas.edu), I picked up a summer hobby of writing CAPTCHA breakers. Most CAPTCHAs can be decoded with a combination of Gaussian edge detection and XOR difference analysis with known characters. However this one falls to a simple regex.
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If it's a service, and you are not paying for it, you're not the customer: you're the product being sold.
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