Secure File Sharing System

Abstract: Nowadays, sharing important files over the internet has become very common, but it also increases the risk of unauthorized access and data theft. Many existing file-sharing systems have security issues such as weak authentication and poor access control. This paper presents a Secure File Sharing System with Multi-Factor Authentication (MFA) to improve the security of file sharing. The system is developed using Next.js, React, Better- SQLite3, Bcrypt, JSON Web Token (JWT), and Time-based One-Time Password (TOTP). It allows users to securely upload, share, and download files after successful authentication. Passwords are securely stored using Bcrypt, while JWT provides secure user sessions. TOTP-based Two-Factor Authentication adds an extra layer of security to prevent unauthorized access. The proposed system is easy to use, provides secure file sharing, and offers better protection against common cyber threats.

Keywords: Secure File Sharing, Multi-Factor Authentication, JWT, Bcrypt, TOTP, Next.js, Better-SQLite3, Web Security