Efficient Transmission of Secure Images with OFDM using Chaotic Encryption

Image encryption based on s-box and 3D-chaotic maps and secure image transmission through ofdm in rayleigh fading channel

“…Suppose 𝐼𝐼 1 (𝑎𝑎, 𝑏𝑏) and 𝐼𝐼 2 (𝑎𝑎, 𝑏𝑏), a=0, .., M-1, b=0, .., N-1, are two different encrypted images, each of which differs from its related plaintext image by a single pixel. The formula for calculating the % NPCR is as follows in Equation ( 10 𝑀𝑀 * 𝑁𝑁 * 100% (10) where 𝐷𝐷 𝑎𝑎.𝑏𝑏 is a (0, 1) matrix calculated by 𝐼𝐼 1 (𝑎𝑎, 𝑏𝑏) and 𝐼𝐼 2 (𝑎𝑎, 𝑏𝑏). If 𝐼𝐼 1 (𝑎𝑎, 𝑏𝑏)=𝐼𝐼 2 (𝑎𝑎, 𝑏𝑏), then 𝐷𝐷 𝑎𝑎.𝑏𝑏 = 0; otherwise, 𝐷𝐷 𝑎𝑎.𝑏𝑏 = 1, and 𝐷𝐷 𝑎𝑎.𝑏𝑏 ∈ Β 𝑀𝑀×𝑁𝑁 .…”

“…The design of random number generators based on chaos is one of the most common encryption applications of chaotic systems [9]. OFDM has become the norm in modern communication due to its efficacy and dependability in transmitting data over a multipath wireless communication channel [10].…”

“…In addition to being easy to install, it has exceptional resistance to the effects of multipath fading. Fast Fourier Transforms, Discrete Wavelet Transforms, and Discrete Cosine Transforms were all reported in prior research and can be used to construct this method [12][13][14]. Several wireless communication systems and devices, including 4G LTE generation mobile technologies, have incorporated OFDM technology [10].…”

“…Fast Fourier Transforms, Discrete Wavelet Transforms, and Discrete Cosine Transforms were all reported in prior research and can be used to construct this method [12][13][14]. Several wireless communication systems and devices, including 4G LTE generation mobile technologies, have incorporated OFDM technology [10]. Encryption studies based on chaotic systems are incredibly prevalent in the academic literature; some of these studies Laiphrakpam et al [15] tried to produce a chaotic sequence, a sine map was utilized; to strengthen the safety of the system, an elliptic curve point and dynamic permutation table were utilized.…”