Flexible authentication of images

• Main Authors: YANG, Yanjiang, BAO, Feng, DENG, Robert H.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2003
• Subjects: Authentication; Chinese remainder theorem; Localization; Digital image storage; Digital watermarking; Multimedia systems; Security of data; Set theory; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/1085; http://dx.doi.org/10.1117/12.503075
• Institution: Singapore Management University

In this paper, we propose a novel authentication method for digital images that achieves fine authenticating granularity (e.g., block-level granularity). Its appealing flexibility lies in the fact that with only one piece of authenticating data (e.g., digital signature or message authentication code) spanning all blocks, each block can be independently authenticatedwhile ignoring the other blocks. In our method, the authenticating data are derived by means of theChinese Remainder Theorem. To further attest its flexibility, the method provides adjustable confidence by managing the public system parameters. Security issues, advantages, as well as limitations related to the method are addressed. A widerange of potential applications are envisioned to demonstrate its practical significance.