Detection and restoration of a tampered medical image

This paper presents a recoverable image tamper proofing technique using the symmetric key cryptosystem and vector quantization for detecting and restoring of a tampered medical image. Our scheme applies the one-way hashing function and the symmetric key cryptosystem to the host image to generate the verification data. To recover the tampered places, the host image is compressed by vector quantization to generate the recovery data. Once an intruder has modified the host image, our scheme can detect and recover the tampered places according to the embedded verification data and the recovery data. Besides, the proposed scheme can withstand the counterfeit attack.