Information Security
Proposal of Access Control Scheme and Digital Watermarking to Prevent Information Leakage
What kind of research?
A method of changing the read/write permissions of a file according to the role of the user is called access control. In our laboratory, we theoretically analyze the risk of information leakage that can occur when using this access control.
We are also proposing various approaches to digital watermarking, a method of embedding information for copyright protection.
Access control method considering information leakage
We propose an access control scheme that minimizes the risk of information leakage caused by a user who is authorized to write information to a different file. By modeling the access control space using graph theory and changing access privileges that are prone to information leaks, it is possible to significantly reduce information leaks.
digital watermarking
We aim to minimize the differences between the embedded image and the original image as much as possible by successfully embedding the necessary information. For example, by using the characteristics of the compression method used to embed JPEG images, which have a rough image quality, it is possible to embed necessary information without feeling any difference from the original JPEG image. We also propose a technique to manage watermark information using blockchain technology used in Bitcoin.