MAYURI GANJUDDE; PROF. FAZEEL.I.Z.QURESHI. DESIGN PAIR BASED ALGORITHM FOR SELECTION OF CAPTCHA TO GET BETTER SECURITY AGAINST HARD AI. International Engineering Journal For Research & Development, [S. l.], v. 3, n. IOCARDET, p. 6, 2018. Disponível em: https://www.iejrd.com/index.php/iejrd/article/view/441. Acesso em: 30 apr. 2026.