Abstract: Security of personal devices, bank accounts and Digi-locker, etc. are always given high priority in every human life, the security of these things are accomplished using Personal identification numbers and password. In current day to day life we are complete depend on entering the pin via their hands on a keyboard but this method is not completely safe because the chance of knowing the password by others are more in this case, someone who is standing behind user while user entering the password can easily see what user is typing on a keyboard, this method is known as shoulder surfing and also using thermal detection someone having this thermal detection device can easily crack the entered password or PIN by looking at the keyboard. This two methods i.e., shoulder surfing and thermal tracking are the major drawbacks of entering password or PIN on a keyboard, to overcome these drawbacks this paper proposes a method of entering the PIN using below steps
1. Face detection
2. PIN entry by blinking eyes
3. One Time Password(OTP)

Keywords: User authentication, OTP (one-time password), Haar Cascade, LBPH, Eye blink PIN entry, Face detection, Face recognition.

| DOI: 10.17148/IARJSET.2021.86122