May 2022
Beginner to intermediate
756 pages
21h 30m
Korean
book
HTTP 완벽 가이드
by David Gourlry, Brian Totty, Lee Eung Jun, Sang -Il Jeong, Anshu Agarwal, Seilu Reddy, Marjorie Sayre
Content preview from HTTP 완벽 가이드
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361
14
장 보안 HTTP
The Definitive Guide
그림 14-5는 키가 있는 암호의 예를 묘사한다. 암호 알고리즘은 별 것 아닌 ‘N번-
회전’ 암호다. N의 값은 키에 의해 좌우된다. 같은 입력 메시지 ‘meet me at the
pier at midnight’가 같은 인코딩 기계를 통과하더라도 키의 값에 따라 다른 출력을
생성한다. 오늘날 거의 대부분의 암호 알고리즘은 키를 사용한다.
14.2.5
디지털 암호
디지털 계산의 도래로, 두 가지 주요한 발전이 있었다.
· 속도 및 기능에 대한 기계 장치의 한계에서 벗어남으로써, 복잡한 인코딩과 디코
딩 알고리즘이 가능해졌다.
· 매우 큰 키를 지원하는 것이 가능해져서, 단일 암호 알고리즘으로 키의 값마다 다
른 수조 개의 가상 암호 알고리즘을 만들어낼 수 있게 되었다. 키가 길수록 인코
딩의 많은 조합이 가능해지고 무작위로 추측한 키에 의한 크래킹이 어려워진다.
기계 장치의 물리적인 금속 키나 다이얼 설정과는 달리, 디지털 키는 그냥 숫자에
불과하다. 이들 디지털 키 값은 인코딩과 디코딩 알고리즘에 대한 입력값이다. 코
딩 알고리즘은 데이터 덩어리를 받아서 알고리즘과 키의 값에 근거하여 인코딩하
거나 디코딩하는 함수이다.
평문 메시지 P, 인코딩 함수 E, 디지털 인코딩 키 e가 주어지면 부호화된 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.