신뢰성 있고 효율적인 정보보호를 위한 정보보호 시스템은 안전성이 입증된 암호기술을 사용하여 기밀성과 인증성을 보장받아야 한다. 기본적으로 정보보호시스템이 갖추어야 할 요소인 난수 발생기는 수학적인 논리에 의하여 안전성과 난수성이 증명 가능하도록 설계되는 것이고, 암호알고리즘의 초기 변수값, 키 등을 생성하는데 이용되며 난수 발생기의 안전성이 전체 정보보호시스템의 안전성에 영향을 준다. 본 논문에서는 블록 암호 알고리즘을 기반으로 하는 의사난수 발생기를 설계하여 제안하고, 그의 안전성에 대해서 연구한다.
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