Tag:Php-image

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• reCAPTCHA (1)
  captcha technology security wikipedia interesting library webdev recaptcha future design randomcoolstuff text php-image cmu blowyourmindhumanendeavors books ocr
• HMAC (1)
  security hmac hash crypto authentication algorithms wikipedia programming encryption cryptography research reference api md5 protocol hashing internet captcha message_authentication_code legallink s3 secure key php-image hash_function @toread algorithm criptografia digest hmac-sha1