In this work, one of the methods deploying encryption to cipher data is represented. The primary object of this project is applying Advanced Encryption Standard (AES) in communications based Orthogonal Frequency Division Multiplexing (OFDM). This article discusses the security of the method encrypting directly QAM symbols instead of input bit-stream. | VNU Journal of Science Comp. Science amp Com. Eng Vol. 36 No. 1 2020 57-64 Original Article Performance of Orthogonal Frequency Division Multiplexing Based Advanced Encryption Standard Duc-Tai Truong Quoc-Tuan Nguyen Thai-Mai Thi Dinh VNU University of Engineering and Technology Vietnam National University Hanoi 144 Xuan Thuy Cau Giay Hanoi Vietnam Received 06 December 2019 Revised 07 March 2020 Accepted 12 May 2020 Abstract Currently there are a lot of secure communication schemes have been proposed to hide secret contents. In this work one of the methods deploying encryption to cipher data is represented. The primary object of this project is applying Advanced Encryption Standard AES in communications based Orthogonal Frequency Division Multiplexing OFDM . This article discusses the security of the method encrypting directly QAM symbols instead of input bit-stream. This leads to improving the security of transmitting data by utilization of authentication key between the mobile and base station. The archived results demonstrate that the performance of the AES-OFDM system is completely acceptable to compare with the criteria for 4G. Keywords Orthogonal Frequency Division Multiplexing OFDM Advanced Encryption Standard AES Quadrature Amplitude Modulation QAM Authentication Key Cellular Network Encryption Physical Layer 4G LTE. 1. Introduction users. When adversaries can access to an underlying secret of the system the information In recent years the issue of information security shall be threatened. security has been more and more urgent. In Though security is commonly integrated at wireless communications the security the higher layer of the protocol stack it can get requirement is strongly essential broadcast over passed by adversaries. Generally higher layers the wireless environment which is less secure security is based on authentication. That means than over wire one. Due to the characteristics of users have their own authorized key or password. wireless .
