On the watermark insertion and extraction methods using the secret sharing method

비밀정보 분할 방식을 적용한 워터마크 삽입.추출 방법

  • 서창호 (공주대학교 응용수학과(정보보호전공)) ;
  • 김석우 (한세대학교 컴퓨터정보통신공학부) ;
  • 성열욱 (공주대학교 응용수학과(정보보호전공))
  • Published : 2001.12.01


This paper proposes a method which inserts watermark created by secret sharing method and then extracts it from watermarked image for the protection of copyrights of digital images. To do this, after image's DCT transform, once some values created by Key sharing method which used Lagrange interpolation are inserted into a frequency domain, one can recreate original watermark even if only k seeds are extracted among n of inserted seeds ($n{\geq}k$).