Image Encryption and Decryption Using SA Algorithm and Optical Correlator System

SA 알고리듬과 광 상관 시스템을 이용한 영상 암호화 및 복호화

  • 김철수 (경주대학교 컴퓨터멀티미디어공학부) ;
  • 조창섭 (경북대학교 대학원 전자공학과)
  • Published : 2004.03.01

Abstract

In this paper, a practical image security system using SA algorithm and 4-f optical correlator system is proposed. The encrypted image and key image with binary phase components are generated using an iterative SA algorithm. a decrypted image is found through the correlation of the encrypted and key images using 4-f optical correlator system. The encrypted and key images are consisted of binary phase components. So, it is easy to implement the optical security system using the proposed technique. And if we fix the encrypted image in the optical security system and change the key images, we get different images, so it is possible to apply to the distinguished authorization system using different key images. Computer simulations show that despite the binary phase components of the two images(encrypted and key image), decrypted images are generated.