More detailed post here: https://zerodha.com/z-connect/zerodha/bulletin-latest-at-zerodha/an-all-new-login-flow-for-kite
Our personal question based 2Factor login system has been a long pending headache. We’ve been unable to replace it for the longest time due to 3rd party legacy systems, but that is now behind us. The new login system provides significant usability and security improvements. Instead of guessable questions and answers, you can now set a 6 digit PIN, like on your phone. This same PIN will soon be implemented across the critical parts of our platforms, along with fingerprint authentication on the upcoming Kite 3.0 mobile app for better security and ease of access. In addition, we now support a mobile authenticator based TOTP system for added security.