Selective Encryption Scheme Based on Region of Interest for Medical Images

의료 영상을 위한 관심영역 기반 선택적 암호 기법

  • 이원영 (부경대학교 정보보호학과) ;
  • ;
  • 이경현 (부경대학교 전자컴퓨터정보통신공학부)
  • Received : 2007.10.11
  • Accepted : 2008.03.13
  • Published : 2008.05.31

Abstract

For the patients' privacy, secure access control of medical images is essentially necessary. In this paper, two types of Region of Interest (ROI)-based selective encryption schemes are proposed, which concentrate on the security of crucial parts in medical images. The first scheme randomly inverts the most significant bits of ROI coefficients in several high frequency subbands in the transform domain, which only incurs little loss on compression efficiency. The second scheme employs a symmetric key encryption to encrypt selectively the ROI data in the final code-stream, which provides sufficient confidentiality. Both of two schemes are backward compatible so as to ensure a standard bitstream compliant decoder so the encrypted images can be reconstructed without any crash.

Acknowledgement

Supported by : 한국과학재단