A Survey on Patients Privacy Protection with Steganography and Visual Encryption

Abstract

AbstractIn this survey, thirty models for steganography and visual encryption methods have been discussed to provide patients privacy protection. Image steganography techniques are classified into two domains: Spatial Domain and Frequency Domain. Spatial hiding models are divided into three groups: Least Significant Bit (LSB), Most Significant Bit (MSB) and other spatial hiding while frequency models are divided into two groups: Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). Moreover, some models have been used to encrypt medical images. Technically, PSNR (Peak-Signal-to-Noise-Ratio) have been computed and compared to investigate and evaluate the model’s performance. As a result of this survey analysis, Frequency Hiding models for DCT (Discrete Cosine Transform) have shown the best average PSNR with 70.66 dB, compared to other approaches.KeywordsSteganographyPatient privacyMedical imagesVisual encryption