Imam Hussein University Passive Defense 2008-6849 11 2 2020 07 22 Lifi Technology: Introduction, Applications, Challenges and Security Evaluation Lifi Technology: Introduction, Applications, Challenges and Security Evaluation 45 59 205019 FA S. Keshvari Imam Hosein Comprehensive University 0000-0002-6025-4999 M. Abbasi Imam Hosein Comprehensive University Journal Article 2019 07 21 Nowadays, with the widespread use of the Internet, one of the great challenges of communication networks is the access speed. The speed of access becomes a challenge when different devices connect to a wireless network. Wi-Fi networks are facing some problems, such as difficult or impossible connectivity in some places and a speed far below today's needs. In this research, while introducing Li-Fi technology, where the data is exchanged wirelessly through visible light, its features and limitations are studied. The architecture and scientific relations and mathematical models of this new technology are also presented. There are new ideas and applications for the Li-Fi that are explored in this paper and finally, Li-Fi technology is compared to Wi-Fi technology based on various parameters. Nowadays, with the widespread use of the Internet, one of the great challenges of communication networks is the access speed. The speed of access becomes a challenge when different devices connect to a wireless network. Wi-Fi networks are facing some problems, such as difficult or impossible connectivity in some places and a speed far below today's needs. In this research, while introducing Li-Fi technology, where the data is exchanged wirelessly through visible light, its features and limitations are studied. The architecture and scientific relations and mathematical models of this new technology are also presented. There are new ideas and applications for the Li-Fi that are explored in this paper and finally, Li-Fi technology is compared to Wi-Fi technology based on various parameters. https://pd.ihu.ac.ir/article_205019_519cfc269f217b222628909302eb6f84.pdf