Abstract
The privacy of unknown person may be included in the digital images unintentionally taken as a sight. The action of the file upload of it would occur invasion of his/her privacy. The JPEG files may include Exif information which is regarded as personal privacy. For these two privacy problems, we propose two privacy protection techniques for JPEG files using reversible information hiding. One is to be able to protect personal privacy if we embed an Exif information into the privacy region. The other is to be able to protect personal privacy when we erase Exif information from the JPEG format and degrade the privacy region by adding some noise. In addition, we embed Exif information and the Huffman code of DCT coefficients in the privacy region into a whole image. In the experiments, we show an example of privacy protection and investigate the feasibility of our method in the real world.
