OTP Generation Using LFSR To Validate Applicant Login Account

Most of the user login accounts used on web sites and mobile apps are authenticated by using a static password. Static password-based authentication systems are not very secure; they are easy to guess, and users also have to remember them. To avoid this problem, an OTP (one time password)-based password generation system for validating user login accounts is developed in this paper. Three types of 13-bit linear feedback shift register (LFSR) circuits are developed using XNOR gates, and they are synthesized and simulated using the Xilinx Vivado 2015.2 tool. Proposed LFSR circuits do not use any initial seed value, and they generate random numbers at a frequency of 200 MHz Random numbers generated by LFSR circuits are written to text files, and four characters of decimal digits are used to generate an OTP In this work, two forms are developed by the Anvil tool, where the user has to enter his email address, date of birth, and OTP to login to the system. The Anvil tool randomly selects the four-character OTP from the text file, and it is sent to the user's email address for validating their login accounts. Developed LFSR circuits consume area (LUTs) in the range of 1-2, and they consume 0.192W–0.193W of power.