CS122B: Projects in Databases and Web Applications Winter 2019

CS122B: Projects in Databases and Web Applications Winter 2019

CS122B: Projects in Databases and Web Applications Winter 2019 Notes 08: reCaptcha Professor Chen Li Department of Computer Science CS122B 1 reCaptcha: preventing internet

bots Web sites have valuable information Example: ticketmaster.com Bad people write programs/bots to send bad requests (e.g., registration, buying tickets) CS122B 2

First version: captcha Use Captcha to correct OCR errors CS122B 3

2nd version: recaptcha CS122B 4 reCaptcha example: TomcatFormReCaptcha.war index.html 3. g-recaptcha-response

2. g-recaptcha-response 4. g-recaptcha-response Secret Key 1. Site Key CS122B 5

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