In this paper, a novel reversible data hiding scheme for encrypted images based on interpolation technique and substitution is proposed. With our proposed scheme, the distribution of neighboring pixels in the encrypted image is relatively uniform, indicating our encryption system is able to offer a lower correlation among encrypted neighboring pixels within the coordinate system. Moreover, the stego images also do not release any information on either the cover image or hidden secret data. With the encryption and scrambling operation, the PSNR of the encrypted stego image is around 10.2594 dB, while the bpp offered by our proposed scheme is 0.06 higher than that of Zhong et al's scheme.

The rise of the Internet has transformed communication and information access, but it also raises serious privacy concerns, especially regarding personal image sharing. This paper presents a novel reversible and authenticable data-hiding scheme for encrypted images that utilizes interpolation techniques and substitution methods. Our encryption system achieves a lower correlation among neighboring pixels, ensuring a more uniform distribution in the encrypted image. The stego images do not reveal any information about the original cover image or secret data. The embedded authentication data provides the ability to verify the authenticity of the image and localize the tampering. Experimental results show that our scheme can securely protect an image from unauthorized access and verify its authenticity.