Open Access

ARTICLE

An Improved Text-Based and Image-Based CAPTCHA Based on Solving and Response Time

Ademola Olusola Adesina¹, Patrick Seun Ayobioloja², Ibidun Christiana Obagbuwa³, Tola John Odule¹, Adenrele A. Afolorunso², Sunday Adeola Ajagbe^4,*

1 Department of Mathematical Sciences, Olabisi Onabanjo University Ago-Iwoye, 120107, Nigeria
2 National Open University of Nigeria, Abuja, 900001, Nigeria
3 Sol Plaatje University, Kimberley, Northern Cape, 8305, South Africa
4 Computer Engineering Department, Ladoke Akintola University of Technology, LAUTECH, Ogbomoso, 210214, Nigeria

* Corresponding Author: Sunday Adeola Ajagbe. Email: