A Novel Method for Image Integrity Authentication Based on Fixed Point Theory
This addresses image authentication for security applications, but it appears incremental as it builds on fixed point theory rather than introducing a new paradigm.
The paper tackled image integrity authentication by transforming images into fixed points of periodic functions, achieving strong performance in security, transparency, fragility, and tampering localization.
Based on fixed point theory, this paper proposes a simple but efficient method for image integrity authentication, which is different from Digital Signature and Fragile Watermarking. By this method, any given image can be transformed into a fixed point of a well-chosen function, which can be constructed with periodic functions. The authentication can be realized due to the fragility of the fixed points. The experiments show that 'Fixed Point Image' performs well in security, transparence, fragility and tampering localization.