Using Steganography and Artificial Neural Network for Data Forensic Validation and Counter Image Deepfakes

The merging of the Internet of Things (IoT) and Artificial Intelligence (AI) advances has intensified challenges related to data authenticity and security. These advancements necessitate a multi-layered security approach in ensuring security, reliability and integrity of critical infrastructure and intelligent surveillance systems. This paper proposes a two-layered security approach combining a discrete cosine transform least significant bit 2 (DCT-LSB-2) – with artificial neural networks (ANN) for data forensic validation and mitigating deepfakes. The proposed model encodes validation codes within the LSBs of cover images captured by an IoT camera on the sender side, leveraging the DCT approach to enhance the resilience against steganalysis. On the receiver side, a reverse DCT-LSB-2 process decodes the embedded validation code, which is subjected to authenticity verification by a pre-trained ANN model. The ANN validates the integrity of the decoded code, and ensures that only device-originated, untampered images are accepted. The proposed framework achieved an average SSIM of 0.9927 across the entirely investigated embedding capacity of between 0 to 1.988 bpp. DCT-LSB-2 showed a stable Peak Signal-to-Noise Ratio (average 42.44 dB) under different evaluated payloads of between 0 to 100 kB. The proposed model achieved a resilient and robust multi-layered data forensic validation system.