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A Study on Efficient Tamper Detection of Digital Image

디지털 영상의 효율적인 변형 검출에 관한 연구

  • Woo, Chan-Il (Dept. of Information and Communication Engineering, Seoil University) ;
  • Lee, Seung-Dae (Dept. of Electronic Engineering, Namseoul University)
  • 우찬일 (서일대학교 정보통신과) ;
  • 이승대 (남서울대학교 전자공학과)
  • Received : 2016.08.10
  • Accepted : 2016.11.10
  • Published : 2016.11.30

Abstract

Digital watermarking is a technique used to hide information within digital media. Digital watermarking techniques can be classified as either robust watermarking or fragile watermarking. Robust watermarking techniques are generally used for the purpose of copyright protection. In addition, fragile watermarking techniques are used for the authentication and integrity verification of a digital image. Therefore, fragile watermarks should be easily breakable for trivial tampering of a watermarked image. This paper proposes an efficient fragile watermarking method for image tamper detection in the spatial domain. In the proposed method, a hash code and symmetric key encryption algorithm are used. The proposed method of inserting a watermark by dividing the original image into many blocks of small sizes is not weak against attacks, such as cut and paste. The proposed method can detect the manipulated parts of a watermarked image without testing the entire block of the image.

Keywords

Authentication;Encryption;Fragile;Watermarking;Hash Function;Tamper Detection

Acknowledgement

Supported by : 서일대학교

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