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IPsec의 핵심 프로토콜(AH, ESP, IKE), 터널 모드 vs 전송 모드, SA/SPI 개념, Phase 1/Phase 2 협상 과정까지. 패킷 하나가 암호화되어 전달되는 전 과정을 그림과 코드로 해부합니다.
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