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Posts Tagged ‘CSS’

How not to design a CAPTCHA

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 [...]

Fiendish CSS-based technique for obfuscating text

Asa Raskin's developed a fairly ingenious, CSS-based means of obfuscating text; briefly, he inserts random characters in the text and applies a "do not render" CSS style to them. The words render as normal on your screen, but when copied to the clipboard, the junk text is also picked up. It's been years since I did much with CSS, but I have [...]