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Secure Images Transmission Through OFDM System

OFDM (Orthogonal Frequency Division Multiplexing) Next-generation wireless communication networks rely heavily on the OFDM system to transmit digital information in a more effective method as well as other traditional methods. Using mobile devices, digital document data such as videos, images, and texts can be easily shared and copied without the owner's permission. In this case, information security is a primary consideration. There are several advantages to using chaotic systems, such as their randomness, which makes them far more secure than traditional encryption methods, such as RSA (AES, DES). An efficient method for transmitting secure images across an AWGN channel has been developed because of this research. The dual-sided encryption and scrambling method for an OFDM system proposed in this paper is described in detail. Here, MATLAB is used to design an OFDM system that employs high-efficiency scrambling and a chaotic map for encryption to achieve high-security image transfer. Signal to noise ratio as well as bit error rate measurements are utilized to gauge the clear of image transmission. Using entropy, histogram analysis, NPCR, and UACI for testing encryption quality.