ELECTRONIC VOTING SYSTEM With Real-Time Authentication And Keypad

A secure electronic voting system with real-time authentication and keypad enables accurate, tamper-proof voting through identity verification and controlled access.

- By RAKESH JAIN

Voters authenticate using unique credentials before casting votes through a keypad interface. The system enhances transparency, prevents duplication or fraud, and records votes securely, making the electoral process faster, more reliable, and suitable for modern democratic environments.

The system offers a secure, efficient, and practical biometric voting approach by combining fingerprint authentication with keypad-based candidate selection. The prototype is shown in Fig. 1, and the components used are listed in the Bill of Materials table.

Circuit and working

Fig. 2 shows the circuit diagram of the electronic voting system. It employs an Arduino Uno, an R305 fingerprint sensor, a 20 × 4 LCD display, four push buttons, and a buzzer to support a tamper-proof and user-friendly voting process. Each of the 14 authorised users (10 voters and 4 candidates) is preregistered and permitted to vote only once.

(EFY note. A 20 × 4 LCD with a 4/8-bit interface has been used in this system. It may be replaced with a 16 × 2 I2C LCD to reduce wiring. In such a case, the code must be adjusted accordingly. The system has also been tested with an I2C display and found to work reliably.)

After successful fingerprint authentication, the system displays the voter's name on the LCD and prompts the selection of one of four candidates: Anil, Gunmala, Rekha, or Monu. A buzzer confirms that the vote has been recorded. The vote count remains concealed until the authorised administrator (Rakesh Jain) authenticates via fingerprint, after which the final tally is displayed.