Light-Fidelity is abbreviated as Li-Fi. Where the technique is new and was introduced in 2011 by Harald Haas, a physicist from Germany. Light Fidelity is a form of wireless networking technology that uses LEDs to transport data. Visible light communication, or VLC, is an optical communication system that uses the visible light as a medium to transmit data. Li-Fi is a type of lightbased bidirectional communication. Wireless Fidelity is utilised for general cover in buildings, but Li-Fi is suitable for wireless data transfer in tight spaces and is very useful and beneficial where radio wave interference is an issue.Light Fidelity has already achieved rates from over 1 Gbps in the lab, outperforming Wi-Fi in terms of bandwidth, efficiency, and connectivity. In this study, it looks into the use of VLC with Li-Fi, which is a secure way of transferring information wireless that is far more secure than traditional Wi-Fi design.

Keywords : Li-Fi (Light Fidelity), Wi-Fi (Wireless Fidelity), VLC (Visible Light Communication), LOS (Line of Sight), LED (Light Emitting Diode), DDOS (Distributed Denial of Service), MITM (Man In The Middle).