Captcha
- 3. Definition Types Of Captcha Captcha Logic Do’s & Don’ts Applications 3D Captcha Recaptcha Conclusion OUTLINE:
- 4. CAPTCHA Means:Completely Automated Public Turing Test to Tell Computers and Humans Apart. It Is a Combination of Letters Which Human Can Understand Computer Not. It Is a Program That Protects Websites Against Bots by Generating and Grading Tests That Humans Can Pass Computer Can not. Definition
- 6. -CAPTCHA is used to prevents hackers from using automated software for spamming. -CAPTCHA is used to check whether a human is inputting the data or a automated computer script. Why Do We Need Captcha ?
- 8. TEXT -These are Simple to Implement. -Novel approach is to present the user with some questions which only a human user can solve. Example: -What is the colour of the milk ? Visual
- 9. Gimpy -In Gimpy It Picks Up 10 Random Words From Dictionary and Distorts Fills With Noise. -User Has To Recognize Atleast 3 Words. -If The User Is Correct, then He is Admitted. Visual
- 10. BONGO -It Displays a Series Of Blocks. -Find The Common Characteristics In Given Set. Graphics
- 11. PIX -It Uses A Large Database Of Labeled Images. -It Shows a Set Of Images, User has To Recognize the Particular Image Among Those. Graphics
- 12. -It Requires User To Solve A Speech Recognisation Test. -In This Version Of Captcha, Letters Are Read Aloud Instead Of Being Displayed In An Image. Audio
- 13. -Generate The Question. -Present The Question To The User. -If Correct, Allow User To Access. -Persist The Correct Answer. -Evaluate Answer If Incorrect, Start Again Generate Different Captchas. Captcha ‘Logic’
- 14. -Don’t Share Captcha Solution In Webpage's Meta Data. -Avoid Repetition Of Questions. -A Captcha Is Not Good If It Doesn’t Distort. Do’s & Don’ts
- 15. -Web Registers. -Smart Cards. -Protecting Confidential Webpages. -Online Polls. -Prevent Dictionary Attacks. -Preventing Spam In VOIP. Applications
- 16. -It Is The Captcha “Nice To Humans,Bad To Machines”. -It Is Also Called As “Super Captcha”. -It Is Written In PHP. 3D Captcha
- 17. -It Is Updated Version Of Captcha. -RECAPTCHA Acts Like a CAPTCHA and Also It Improves the Process “Digitization Of Books”. -By Adding reCAPTCHA To a Site, you Can Block Automated Software. -As Far As CAPTCHAs Go, reCAPTCHA Seems To Be Easiest To Use and the Most Reliable. RECAPTCHA
- 19. “ As Internet is rapid the thing we need is Security, by introducing CAPTCHAS we can achieve high security for our Websites ” Conclusion
- 20. ~THANK YOU!! -Priyanka.G -Madhuri.S (Aditya Degree College for Women Rjy...)