English to Japanese Tech/Engineering Computers: Software

A common and practical control is throttling authentication attempts. There are several variations of ***authentication throttling***: constant time throttling, increased period throttling, and CAPTCHA-based throttling. Constant time throttling adds a constant waiting period, usually of a few seconds, before announcing authentication results. Increased period throttling increments the waiting period after each failed authentication attempt. CAPTCHA-based throttling requires the user to solve a puzzle that is supposed to be difficult for bots for each authentication attempt.