Abstract:

The LL sub-band from the discrete wavelet transform in JPEG2000 is similar to a smaller image of the original in spatial domain. The proposed authentication and tamperproofing scheme is to extract and hide the entire LL sub-band into the first-level sub-bands, 1LH and 1HL. The hidden data are used later with a unique digital signature and a public key to prove the authenticity of the image. Tampered areas could be accurately detected and recovered to a quality that is visually acceptable. This scheme can be used to authenticate sensitive images, such as medical images, to prove rightful ownership and to recover images before originals are available.

Keywords: JPEG2000; DIGITAL SIGNATURE ALGORITHM; DISTORTION REDUCTION; SPECIAL CHARACTERISTIC VALUES

Document Type: Research article

DOI: 10.1179/136821904225020221

Affiliations: 1: Department of Computer Science and Information Management, Hungkuang University, No. 34 Chung-chi, Shalu Taichung 433, Taiwan 2: Department of Information Management, National Taichung Institute of Technology, No. 129 Sec. 3, San-min Rd, Taichung 404, Taiwan