우주 환경에서 다양한 노이즈로부터 암호화된 영상을 안전하게 전송하기 위한 연구
Study to safely transmit encrypted images from various noises in space environment
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본 논문에서는 우주라는 특수한 환경에서 권장하는 무선 통신의 채널 코딩으로 암호화된 이미지가 노이즈에 많은 영향으로 손상되는 문제를 개선하기 위해 난수발생기 PP(PingPong256)와 셔플기법을 제안한다. PP는 512비트의 초기값을 입력받아 끊임없이 난수를 생성할 수 있다. 난수는 이미지와 배타적 논리연산을 통해 암호화가 가능하다. 셔플 기법은 이미지 픽셀위치와 난수 배열위치를 동기화하고 난수 배열을 오름차순으로 위치를 이동하면서 이미지 픽셀 위치를 무작위로 재배열한다. 따라서 채널 코딩에 PP와 셔플 기법을 사용하면 모든 픽셀이 미세하게 분산되어 열악한 전송 환경에도 높은 품질의 이미지를 전송할 수 있다.
Abstract
In this paper, we propose a random number generator PP(PingPong256) and a shuffle technique to improve the problem that the encrypted image is damaged due to a lot of noise by the channel coding of wireless communication recommended in the special environment of space. The PP can constantly generate random numbers by entering an initial value of 512 bits. Random numbers can be encrypted through images and exclusive logical computations. Random numbers can be encrypted through images and exclusive logical computations. The shuffle technique randomly rearranges the image pixel positions while synchronizing the image pixel position and the random number array position and moving the random number arrangement in ascending order. Therefore, the use of PP and shuffle techniques in channel coding allows all pixels to be finely distributed and transmit high-quality images even in poor transmission environments.
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