A Combined Cryptography and Error Correction System based on Enhanced AES and LDPC
Rupali V. Chothe, Sunita Pandit Ugale, D. M. Chandwadkar, Shraddha V. Shelke · 2023
Any military organization nowadays depend on networks and communications. Sensitive data that is essential to national security relies on these networks and applications. As a result, the need to safeguard and protect this data arises. An authenticated crypto-coding (encryption combined with channel coding) system is developed which incorporates im-proved Advanced Encryption Standard for security and Low Density Parity Check codes for error correction. Image en-cryption and decryption is done with AES-256 with authentication. LDPC is incorporated as one of the rounds of Encryption. The entire communication system is implemented and simulated using MATLAB. Encryption-encoding-scrambling-modulation is performed on transmit side. The channel model of Additive white Gaussian noise with varying values of SNR-Signal to Noise ratio is used. The results of Bit error rates (BER), no. of errors, recovered images and histograms for dif-ferent SNR values are added. The parameters like correlation, entropy and noise variance are calculated and verified. The Enhanced encryption offers a higher security compared to conventional AES. Hence, the modified method can be used to safeguard sensitive information.