An Improved Text-Based and Image-Based CAPTCHA Based on Solving and燫esponse Time

CAPTCHA is an acronym that stands for Completely Automated Public Turing Test to tell Computers and Humans Apart (CAPTCHA), it a good example of authentication system can be used determine the true identity any user. It serves as security measure prevent attack caused by web bots (automatic programs) during online transaction. come text-based or image-based depending on project programmer. The usability robustness, well level security, provided each varies call development improved system. Hence, this paper studied two different systems (the CAPTCHA). were designed using JavaScript. Response time solving are metrics effectiveness efficiency systems. inclusion response shortfall robustness existing developed was tested 200 students from Federal College Animal Health Production Technology. results participants, CAPTCHAs, extracted database subjected analysis SPSS. result shows has lowest average (21.3333 s) with 47.8% success rate while highest 23.5138 s 52.8% rate. 2.1855 37.9% lower than (3.5561 62.1% This indicates more effective in terms tests efficient responsiveness recommended potential users.