Siamese Network-Based Detection of Deepfake Impersonation Attacks with a Person of Interest Approach

Deepfake technology presents critical cybersecurity challenges that have become more popular since easily accessible applications have become more widely available. The proliferation of fake portrait videos constitutes a serious risk to the legal system, society, and personal privacy. The publication of fraudulent explicit content starring celebrities, the circulation of fake political videos, and the use of faked impersonated videos as proof in court of law are all examples of the effects of deepfakes in the real world. In reaction to this growing threat, we propose a simple yet efficient Person of Interest (PoI) Siamese network-based model to detect deepfake synthetic content in portrait images, providing a preventative measure against the growing danger of deepfakes. On one side and unlike traditional neural networks, which process inputs independently, our approach leverages a Siamese network that processes two inputs simultaneously using identical sub-networks with shared weights and parameters. This twin structure is particularly effective for our adopted PoI methodology, where one input is a reference image of a specific individual, and the other is an image that needs to be verified as either real or fake. By ensuring that both the reference and the suspect image are processed in the same way, the network can accurately learn and detect subtle differences, enabling it to determine whether the second image is a genuine representation of the individual or a deepfake. This makes our method particularly relevant for targeted forensic investigations or security applications where an individual’s media integrity is paramount. On the other side, our proposed method does not require any additional complex biological feature extraction. Despite this simplification, our method achieves comparable accuracy to more complex models that rely on biological feature extraction. This efficiency makes our approach practical for implementation on resource-constrained devices, such as mobile phones and Internet of Things (IoT) systems.