{"post_id":137472967,"document_srl":137472967,"module_srl":133197332,"is_external_document":0,"source_url":"","member_srl":133185757,"author_member_srl":133185757,"author_name":"정보보호","author_avatar_color":"#64B5F6","profile_image_url":"","author_is_online":0,"title":"2024 서울시 7급 정보보호론 1번 (2024.11.2.)","is_content_derived_title":0,"content":"","images":["https://store.0gichul.com/file-view.php?id=e-OaMXTGxjNdVoI4uugA_AECKowpG95GmLy5fQJgJG4T1r4SBpcFx7JSF-_-NAMqiaJ-YtVdD_nWsT-L1W0asO1xMIDIJFBGoKPYnE2vVzVHjbRNub00vGI-AcaxFeqEFZ1cHo-9Py1ve-UB4U5u5HD0aZYjy6WhVzv8C8oH-ppfN5pL3qHhlamafHbc2Jr6SI7bG3VRm-Ge8iC0msyKkDqWjg\u0026sig=YovcRgsvhNKdF7H6Ibd5oHz8\u0026v=1784394139\u0026fs=131238\u0026vh=4ab8474c05ae"],"attachments":[],"youtube_video_id":"","like_count":0,"comment_count":4,"repost_count":0,"share_count":0,"save_count":0,"is_liked":0,"is_saved":0,"is_reposted":0,"is_shared":0,"is_commented":0,"question_display_title":"2024 서울시 7급 정보보호론 1번 (2024.11.2.)","question_progress_label":"1/20","question_thread_order":1,"question_thread_total":20,"is_question_thread_root":1,"hide_comments_initially":1,"poll":{"poll_srl":46981,"document_srl":137472967,"question_srl":118720,"poll_type":"question","title":"","allow_multiple":0,"show_result_policy":"after_vote","show_answer_policy":"after_vote","is_closed":0,"has_voted":0,"viewer_option_srl":0,"viewer_option_no":0,"viewer_is_correct":null,"can_show_results":0,"can_show_answer":0,"total_votes":0,"correct_rate":null,"options":[{"option_srl":207747,"option_no":1,"label":"1","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":207748,"option_no":2,"label":"2","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":207749,"option_no":3,"label":"3","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":207750,"option_no":4,"label":"4","vote_count":0,"percent":0,"is_correct":null,"is_selected":0}]},"created_at":"2026-07-19 02:09:01","activity_at":"20260719020901","activity_type":"post","activity_member_srl":133185757,"activity_author_name":"정보보호","activity_avatar_color":"#64B5F6","activity_profile_image_url":"","activity_is_online":0,"is_question_story":1,"my_comment":null,"first_comment":{"comment_id":130906195,"comment_srl":130906195,"post_id":130885860,"document_srl":130885860,"author_member_srl":0,"author_name":"군무원화이팅","author_avatar_color":"#FFA07A","profile_image_url":"","content":"* 까다로운 문제에 대해 아는바로 적어봤습니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n2번 - ECB 모드\u003Cbr /\u003E\n④ 사전 연산이 가능한 모드는 OFB 모드입니다. OFB 모드에서 사전 계산을 한다는 것은 동기화를 위한 암호화 키 스트림을 미리 생산하는 것을 말합니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n4번 - RSA암호의 공개키\u003Cbr /\u003E\n1) N = 7*11 이므로 φ(N) = (7-1)(11-1) = 60\u003Cbr /\u003E\n2) e의 범위는 1 \u0026lt; e \u0026lt; φ(N) 이며 φ(N)과 서로소인 수\u003Cbr /\u003E\n3) 60 = 2^2 * 3 * 5 이므로 서로소 형태로 필터링하면 3, 5, 9는 정답 후보에서 탈락, 따라서 e=7\u003Cbr /\u003E\n4) (굳이 계산을 하면..) 위를 통해 de mod 60 = 1 을 세울 수 있고 이는 60k + 1 = de (k는 0 이상의 정수)\u003Cbr /\u003E\n5) k=5 일때 e=7, d=43으로 계산할 수 있습니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n9번 - 양자내성암호\u003Cbr /\u003E\n(최근 양자컴퓨팅 관련 문제가 7급에서 많이 출제되고 있습니다...화이팅...)\u003Cbr /\u003E\n㉡ \u0027그루버 알고리즘\u0027은 1996년 Lov Grover가 제안한 양자 알고리즘으로 다항 시간 내에 대칭키 암호를 복호화(무력화)시킬 수 있는 알고리즘입니다. 보기에서 RSA는 공개키 기반 암호이기 때문에 잘못된 설명입니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n㉣ 양자 컴퓨팅 환경에선 사용되는 쇼어 알고리즘에선 기존 공개키인 RSA, ECDSA는 취약하여 PQC(양자내성암호)를 제안 및 개발하고 있습니다. 따라서 잘못된 설명입니다.\u003Cbr /\u003E\n* 양자내성암호 : 격자 기반, 해시 기반, 코드 기반, 다변수 기반, 아이소제니 기반\u003Cbr /\u003E\n\u003Cbr /\u003E\n13번 - XSS\u003Cbr /\u003E\n② SELECT ~ FROM ~ WHERE 구문은 SQL Query 구문으로 SQL Injection 공격과 관련이 있습니다. XSS는 주로 HTTP Request Line에서의 GET 방식을 사용하고 있는 서버 연결을 이용합니다. \u003Cbr /\u003E\n\u003Cbr /\u003E\n④ 보기에서 \u0027웹 애플리케이션에 저장하는 것이 아니라 URL의 변수 부분처럼 스크립트 코드를 입력하는 동시에 결과가 ~\u0027를 해석해보면, 예를들어 게시판에 저장된 악성 스크립트가 곧장 클라이언트로 이동하는 것이 아니라 URL을 통해 서버에 요청이 전달되면 미리 감염된 서버에서 응답을 클라이언트에게 발송하는, 즉 서버를 통해 응답을 팅김(반사하여)으로서 클라이언트에서 공격자가 의도한 공격이 실행 됨을 의미합니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n16번 문제 - ESP 터널 모드\u003Cbr /\u003E\n* 풀이는 그렇게 어렵지 않지만 최근 유행하는 출제기조가 ESP-Header 와 ESP-Trailer의 상세 구조와 암호화 범위를 묻고있습니다. 뿐만 아니라 최상난이도 문제는 SPD, SAD, IKE 관련 문제도 출제되고 있습니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n* ESP Header, Trailer 구조\u003Cbr /\u003E\n※ 헤더나 트레일러의 구성 변수를 보기로 제시한 다음 암호화 대상이 아닌것은? 인증 대상이 아닌것은? 식의 문제가 출제되고 있습니다.\u003Cbr /\u003E\n- ESP-Header : SPI(Security Parameter Index)(32bit), Sequence Number(32bit)\u003Cbr /\u003E\n- ESP-Trailer : Padding(가변길이), Next Header(8bit), Pad Length(8bit)\u003Cbr /\u003E\n→ ESP 터널모드는 원본 데이터(Origin-IP Header, Payload)와 ESP-Trailer를 암호화하고 암호화한 데이터와 ESP-Header를 인증합니다.\u003Cbr /\u003E\n\u003Cbr /\u003E\n19번 - 보호대책 요구사항 분야\u003Cbr /\u003E\n* 보안대책 요구사항 분야는 12개로 구분되며 암기가 필요합니다...내부 항목까진 어렵더라도 12개 분야는 암기하는 것을 추천드립니다.\u003Cbr /\u003E\n* ②의 \u0027접근권한 검토\u0027는 \u0027인증 및 권한관리\u0027에 해당합니다. \u0027접근통제\u0027 분야에는 \u0027-통제\u0027, \u0027-접근\u0027와 같은 키워드가 붙어 있습니다. 참고바랍니다.","created_at":"2025-06-28 19:25:42","regdate":"20250628192542","like_count":0,"reply_count":0,"repost_count":0,"share_count":0,"save_count":0,"is_liked":0,"is_reposted":0,"is_shared":0,"is_saved":0,"is_following":0,"is_online":0,"depth":0,"parent_comment_id":0,"parent_comment":null}}
{"post_id":137439252,"document_srl":137439252,"module_srl":133197332,"is_external_document":0,"source_url":"","member_srl":133185757,"author_member_srl":133185757,"author_name":"정보보호","author_avatar_color":"#64B5F6","profile_image_url":"","author_is_online":0,"title":"2025 경찰 경력채용 정보보호론 1번 (2025.9.13.)","is_content_derived_title":0,"content":"","images":["https://store.0gichul.com/file-view.php?id=hBDRvxeBOJX_3EU7XgHqt2_R22WcN1tTWc7LV20lSvhLfS9Geo7_11BSUMCvWneMPNJyJe9niaTx8_MbiogWnn1OlR4K3gONuLmBO1JJ6xSUV8zcriLQ_-fd4Bm_pwrEl3tR5pr_Dvvy7lcLgq8fZpuN5vEGfcXRymEnp2RsNFYRxwG_w0oWAdFzqqhBkHP_mJ_xVCle4OWN4-LJEeVGqPriNw\u0026sig=WY6QoGGzH2JNJJ3t7IQW0BpI\u0026v=1784265906\u0026fs=76881\u0026vh=5d3f54408c2a"],"attachments":[],"youtube_video_id":"","like_count":0,"comment_count":3,"repost_count":0,"share_count":0,"save_count":0,"is_liked":0,"is_saved":0,"is_reposted":0,"is_shared":0,"is_commented":0,"question_display_title":"2025 경찰 경력채용 정보보호론 1번 (2025.9.13.)","question_progress_label":"1/20","question_thread_order":1,"question_thread_total":20,"is_question_thread_root":1,"hide_comments_initially":1,"poll":{"poll_srl":46051,"document_srl":137439252,"question_srl":116515,"poll_type":"question","title":"","allow_multiple":0,"show_result_policy":"after_vote","show_answer_policy":"after_vote","is_closed":0,"has_voted":0,"viewer_option_srl":0,"viewer_option_no":0,"viewer_is_correct":null,"can_show_results":0,"can_show_answer":0,"total_votes":0,"correct_rate":null,"options":[{"option_srl":203637,"option_no":1,"label":"1","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":203638,"option_no":2,"label":"2","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":203639,"option_no":3,"label":"3","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":203640,"option_no":4,"label":"4","vote_count":0,"percent":0,"is_correct":null,"is_selected":0}]},"created_at":"2026-07-17 14:30:37","activity_at":"20260717143037","activity_type":"post","activity_member_srl":133185757,"activity_author_name":"정보보호","activity_avatar_color":"#64B5F6","activity_profile_image_url":"","activity_is_online":0,"is_question_story":1,"my_comment":null,"first_comment":{"comment_id":134972705,"comment_srl":134972705,"post_id":130911631,"document_srl":130911631,"author_member_srl":113148859,"author_name":"청년열정손맛마라흑당민트초코마카롱탕후루","author_avatar_color":"#7986CB","profile_image_url":"https://0gichul.com/files/member_extra_info/profile_image/859/148/113/113148859.png?t=1696740104","content":"6","created_at":"2026-05-26 21:02:53","regdate":"20260526210253","like_count":0,"reply_count":0,"repost_count":0,"share_count":0,"save_count":0,"is_liked":0,"is_reposted":0,"is_shared":0,"is_saved":0,"is_following":0,"is_online":0,"depth":0,"parent_comment_id":0,"parent_comment":null}}
{"post_id":137231717,"document_srl":137231717,"module_srl":133197332,"is_external_document":0,"source_url":"","member_srl":133185757,"author_member_srl":133185757,"author_name":"정보보호","author_avatar_color":"#64B5F6","profile_image_url":"","author_is_online":0,"title":"2023 경찰 1차 정보보호론 1번 (2023.3.25.)","is_content_derived_title":0,"content":"","images":["https://store.0gichul.com/file-view.php?id=e_9uTKylCxqEEtHimt5RJ-OIjtzwvRJAY7rD70s4tDfezb5kfsLTV7CFugIBj_aFShjjziO2H8zxVjvRHqdzSwvm3P15_L0zKv-89EMgjgDOc8FtkcrkkMeAxsW4XX6gz3BCZvH4p6MTF0pYT5OaCRd80AzHukjdckA-AzeTchkuJ8sdnWxwSyZZwHwutuTmwYtEBolN_vGIA1-RkLRPAiiwwg\u0026sig=GIPs6ORhnHq8l63NC1hmhAs9\u0026v=1783480670\u0026fs=123656\u0026vh=14fccc3ba520"],"attachments":[],"youtube_video_id":"","like_count":0,"comment_count":8,"repost_count":0,"share_count":0,"save_count":0,"is_liked":0,"is_saved":0,"is_reposted":0,"is_shared":0,"is_commented":0,"question_display_title":"2023 경찰 1차 정보보호론 1번 (2023.3.25.)","question_progress_label":"1/20","question_thread_order":1,"question_thread_total":20,"is_question_thread_root":1,"hide_comments_initially":1,"poll":{"poll_srl":40771,"document_srl":137231717,"question_srl":88370,"poll_type":"question","title":"","allow_multiple":0,"show_result_policy":"after_vote","show_answer_policy":"after_vote","is_closed":0,"has_voted":0,"viewer_option_srl":0,"viewer_option_no":0,"viewer_is_correct":null,"can_show_results":0,"can_show_answer":0,"total_votes":0,"correct_rate":null,"options":[{"option_srl":180330,"option_no":1,"label":"1","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":180331,"option_no":2,"label":"2","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":180332,"option_no":3,"label":"3","vote_count":0,"percent":0,"is_correct":null,"is_selected":0},{"option_srl":180333,"option_no":4,"label":"4","vote_count":0,"percent":0,"is_correct":null,"is_selected":0}]},"created_at":"2026-07-08 12:18:31","activity_at":"20260708121831","activity_type":"post","activity_member_srl":133185757,"activity_author_name":"정보보호","activity_avatar_color":"#64B5F6","activity_profile_image_url":"","activity_is_online":0,"is_question_story":1,"my_comment":null,"first_comment":{"comment_id":102073223,"comment_srl":102073223,"post_id":101490163,"document_srl":101490163,"author_member_srl":84077291,"author_name":"Dhc","author_avatar_color":"#7986CB","profile_image_url":"","content":"가즈아ㅏㅏㅏㅏㅏㅏㅏㅏㅏ","created_at":"2023-04-01 12:21:47","regdate":"20230401122147","like_count":0,"reply_count":0,"repost_count":0,"share_count":0,"save_count":0,"is_liked":0,"is_reposted":0,"is_shared":0,"is_saved":0,"is_following":0,"is_online":0,"depth":0,"parent_comment_id":0,"parent_comment":null}}