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ctfAbout.html
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<!doctype html>
<html>
<head>
<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>
<style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; --title-bar-height:20px; }
.mac-os-11 { --title-bar-height:28px; }
html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }
body { margin: 0px; padding: 0px; height: auto; bottom: 0px; top: 0px; left: 0px; right: 0px; font-size: 1rem; line-height: 1.42857; overflow-x: hidden; background: inherit; tab-size: 4; }
iframe { margin: auto; }
a.url { word-break: break-all; }
a:active, a:hover { outline: 0px; }
.in-text-selection, ::selection { text-shadow: none; background: var(--select-text-bg-color); color: var(--select-text-font-color); }
#write { margin: 0px auto; height: auto; width: inherit; word-break: normal; overflow-wrap: break-word; position: relative; white-space: normal; overflow-x: visible; padding-top: 36px; }
#write.first-line-indent p { text-indent: 2em; }
#write.first-line-indent li p, #write.first-line-indent p * { text-indent: 0px; }
#write.first-line-indent li { margin-left: 2em; }
.for-image #write { padding-left: 8px; padding-right: 8px; }
body.typora-export { padding-left: 30px; padding-right: 30px; }
.typora-export .footnote-line, .typora-export li, .typora-export p { white-space: pre-wrap; }
.typora-export .task-list-item input { pointer-events: none; }
@media screen and (max-width: 500px) {
body.typora-export { padding-left: 0px; padding-right: 0px; }
#write { padding-left: 20px; padding-right: 20px; }
.CodeMirror-sizer { margin-left: 0px !important; }
.CodeMirror-gutters { display: none !important; }
}
#write li > figure:last-child { margin-bottom: 0.5rem; }
#write ol, #write ul { position: relative; }
img { max-width: 100%; vertical-align: middle; image-orientation: from-image; }
button, input, select, textarea { color: inherit; font: inherit; }
input[type="checkbox"], input[type="radio"] { line-height: normal; padding: 0px; }
*, ::after, ::before { box-sizing: border-box; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p, #write pre { width: inherit; }
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p { line-height: inherit; }
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p { orphans: 4; }
h1 { font-size: 2rem; }
h2 { font-size: 1.8rem; }
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h4 { font-size: 1.4rem; }
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h6 { font-size: 1rem; }
.md-math-block, .md-rawblock, h1, h2, h3, h4, h5, h6, p { margin-top: 1rem; margin-bottom: 1rem; }
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a { cursor: pointer; }
sup.md-footnote { padding: 2px 4px; background-color: rgba(238, 238, 238, 0.7); color: rgb(85, 85, 85); border-radius: 4px; cursor: pointer; }
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#write input[type="checkbox"] { cursor: pointer; width: inherit; height: inherit; }
figure { overflow-x: auto; margin: 1.2em 0px; max-width: calc(100% + 16px); padding: 0px; }
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tr { break-inside: avoid; break-after: auto; }
thead { display: table-header-group; }
table { border-collapse: collapse; border-spacing: 0px; width: 100%; overflow: auto; break-inside: auto; text-align: left; }
table.md-table td { min-width: 32px; }
.CodeMirror-gutters { border-right: 0px; background-color: inherit; }
.CodeMirror-linenumber { user-select: none; }
.CodeMirror { text-align: left; }
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.CodeMirror pre { padding: 0px 4px; }
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div.hr:focus { cursor: none; }
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.md-fences { font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; overflow: visible; white-space: pre; background: inherit; position: relative !important; }
.md-fences-adv-panel { width: 100%; margin-top: 10px; text-align: center; padding-top: 0px; padding-bottom: 8px; overflow-x: auto; }
#write .md-fences.mock-cm { white-space: pre-wrap; }
.md-fences.md-fences-with-lineno { padding-left: 0px; }
#write.fences-no-line-wrapping .md-fences.mock-cm { white-space: pre; overflow-x: auto; }
.md-fences.mock-cm.md-fences-with-lineno { padding-left: 8px; }
.CodeMirror-line, twitterwidget { break-inside: avoid; }
.footnotes { opacity: 0.8; font-size: 0.9rem; margin-top: 1em; margin-bottom: 1em; }
.footnotes + .footnotes { margin-top: 0px; }
.md-reset { margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: top; background: 0px 0px; text-decoration: none; text-shadow: none; float: none; position: static; width: auto; height: auto; white-space: nowrap; cursor: inherit; -webkit-tap-highlight-color: transparent; line-height: normal; font-weight: 400; text-align: left; box-sizing: content-box; direction: ltr; }
li div { padding-top: 0px; }
blockquote { margin: 1rem 0px; }
li .mathjax-block, li p { margin: 0.5rem 0px; }
li blockquote { margin: 1rem 0px; }
li { margin: 0px; position: relative; }
blockquote > :last-child { margin-bottom: 0px; }
blockquote > :first-child, li > :first-child { margin-top: 0px; }
.footnotes-area { color: rgb(136, 136, 136); margin-top: 0.714rem; padding-bottom: 0.143rem; white-space: normal; }
#write .footnote-line { white-space: pre-wrap; }
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body, html { border: 1px solid transparent; height: 99%; break-after: avoid; break-before: avoid; font-variant-ligatures: no-common-ligatures; }
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pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; }
p > .md-image:only-child:not(.md-img-error) img, p > img:only-child { display: block; margin: auto; }
#write.first-line-indent p > .md-image:only-child:not(.md-img-error) img { left: -2em; position: relative; }
p > .md-image:only-child { display: inline-block; width: 100%; }
#write .MathJax_Display { margin: 0.8em 0px 0px; }
.md-math-block { width: 100%; }
.md-math-block:not(:empty)::after { display: none; }
.MathJax_ref { fill: currentcolor; }
[contenteditable="true"]:active, [contenteditable="true"]:focus, [contenteditable="false"]:active, [contenteditable="false"]:focus { outline: 0px; box-shadow: none; }
.md-task-list-item { position: relative; list-style-type: none; }
.task-list-item.md-task-list-item { padding-left: 0px; }
.md-task-list-item > input { position: absolute; top: 0px; left: 0px; margin-left: -1.2em; margin-top: calc(1em - 10px); border: none; }
.math { font-size: 1rem; }
.md-toc { min-height: 3.58rem; position: relative; font-size: 0.9rem; border-radius: 10px; }
.md-toc-content { position: relative; margin-left: 0px; }
.md-toc-content::after, .md-toc::after { display: none; }
.md-toc-item { display: block; color: rgb(65, 131, 196); }
.md-toc-item a { text-decoration: none; }
.md-toc-inner:hover { text-decoration: underline; }
.md-toc-inner { display: inline-block; cursor: pointer; }
.md-toc-h1 .md-toc-inner { margin-left: 0px; font-weight: 700; }
.md-toc-h2 .md-toc-inner { margin-left: 2em; }
.md-toc-h3 .md-toc-inner { margin-left: 4em; }
.md-toc-h4 .md-toc-inner { margin-left: 6em; }
.md-toc-h5 .md-toc-inner { margin-left: 8em; }
.md-toc-h6 .md-toc-inner { margin-left: 10em; }
@media screen and (max-width: 48em) {
.md-toc-h3 .md-toc-inner { margin-left: 3.5em; }
.md-toc-h4 .md-toc-inner { margin-left: 5em; }
.md-toc-h5 .md-toc-inner { margin-left: 6.5em; }
.md-toc-h6 .md-toc-inner { margin-left: 8em; }
}
a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; }
.footnote-line a:not(.reversefootnote) { color: inherit; }
.md-attr { display: none; }
.md-fn-count::after { content: "."; }
code, pre, samp, tt { font-family: var(--monospace); }
kbd { margin: 0px 0.1em; padding: 0.1em 0.6em; font-size: 0.8em; color: rgb(36, 39, 41); background: rgb(255, 255, 255); border: 1px solid rgb(173, 179, 185); border-radius: 3px; box-shadow: rgba(12, 13, 14, 0.2) 0px 1px 0px, rgb(255, 255, 255) 0px 0px 0px 2px inset; white-space: nowrap; vertical-align: middle; }
.md-comment { color: rgb(162, 127, 3); opacity: 0.8; font-family: var(--monospace); }
code { text-align: left; vertical-align: initial; }
a.md-print-anchor { white-space: pre !important; border-width: initial !important; border-style: none !important; border-color: initial !important; display: inline-block !important; position: absolute !important; width: 1px !important; right: 0px !important; outline: 0px !important; background: 0px 0px !important; text-decoration: initial !important; text-shadow: initial !important; }
.md-inline-math .MathJax_SVG .noError { display: none !important; }
.html-for-mac .inline-math-svg .MathJax_SVG { vertical-align: 0.2px; }
.md-fences-math .MathJax_SVG_Display, .md-math-block .MathJax_SVG_Display { text-align: center; margin: 0px; position: relative; text-indent: 0px; max-width: none; max-height: none; min-height: 0px; min-width: 100%; width: auto; overflow-y: visible; display: block !important; }
.MathJax_SVG_Display, .md-inline-math .MathJax_SVG_Display { width: auto; margin: inherit; display: inline-block !important; }
.MathJax_SVG .MJX-monospace { font-family: var(--monospace); }
.MathJax_SVG .MJX-sans-serif { font-family: sans-serif; }
.MathJax_SVG { display: inline; font-style: normal; font-weight: 400; line-height: normal; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; zoom: 90%; }
#math-inline-preview-content { zoom: 1.1; }
.MathJax_SVG * { transition: none 0s ease 0s; }
.MathJax_SVG_Display svg { vertical-align: middle !important; margin-bottom: 0px !important; margin-top: 0px !important; }
.os-windows.monocolor-emoji .md-emoji { font-family: "Segoe UI Symbol", sans-serif; }
.md-diagram-panel > svg { max-width: 100%; }
[lang="flow"] svg, [lang="mermaid"] svg { max-width: 100%; height: auto; }
[lang="mermaid"] .node text { font-size: 1rem; }
table tr th { border-bottom: 0px; }
video { max-width: 100%; display: block; margin: 0px auto; }
iframe { max-width: 100%; width: 100%; border: none; }
.highlight td, .highlight tr { border: 0px; }
mark { background: rgb(255, 255, 0); color: rgb(0, 0, 0); }
.md-html-inline .md-plain, .md-html-inline strong, mark .md-inline-math, mark strong { color: inherit; }
.md-expand mark .md-meta { opacity: 0.3 !important; }
mark .md-meta { color: rgb(0, 0, 0); }
@media print {
.typora-export h1, .typora-export h2, .typora-export h3, .typora-export h4, .typora-export h5, .typora-export h6 { break-inside: avoid; }
}
.md-diagram-panel .messageText { stroke: none !important; }
.md-diagram-panel .start-state { fill: var(--node-fill); }
.md-diagram-panel .edgeLabel rect { opacity: 1 !important; }
.md-require-zoom-fix foreignobject { font-size: var(--mermaid-font-zoom); }
.md-fences.md-fences-math { font-size: 1em; }
.md-fences-math .MathJax_SVG_Display { margin-top: 8px; cursor: default; }
.md-fences-advanced:not(.md-focus) { padding: 0px; white-space: nowrap; border: 0px; }
.md-fences-advanced:not(.md-focus) { background: inherit; }
.typora-export-show-outline .typora-export-content { max-width: 1440px; margin: auto; display: flex; flex-direction: row; }
.typora-export-sidebar { width: 300px; font-size: 0.8rem; margin-top: 80px; margin-right: 18px; }
.typora-export-show-outline #write { --webkit-flex:2; flex: 2 1 0%; }
.typora-export-sidebar .outline-content { position: fixed; top: 0px; max-height: 100%; overflow: hidden auto; padding-bottom: 30px; padding-top: 60px; width: 300px; }
@media screen and (max-width: 1024px) {
.typora-export-sidebar, .typora-export-sidebar .outline-content { width: 240px; }
}
@media screen and (max-width: 800px) {
.typora-export-sidebar { display: none; }
}
.outline-content li, .outline-content ul { margin-left: 0px; margin-right: 0px; padding-left: 0px; padding-right: 0px; list-style: none; }
.outline-content ul { margin-top: 0px; margin-bottom: 0px; }
.outline-content strong { font-weight: 400; }
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html {
font-size: 19px;
}
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margin: auto;
background: #fefefe;
}
body {
font-family: "Vollkorn", Palatino, Times;
color: #333;
line-height: 1.4;
text-align: justify;
}
#write {
max-width: 960px;
margin: 0 auto;
margin-bottom: 2em;
line-height: 1.53;
padding-top: 40px;
}
@media only screen and (min-width: 1400px) {
#write {
max-width: 1100px;
}
}
@media print {
html {
font-size: 13px;
}
}
/* Typography
-------------------------------------------------------- */
#write>h1:first-child,
h1 {
margin-top: 1.6em;
font-weight: normal;
}
h1 {
font-size:3em;
}
h2 {
margin-top:2em;
font-weight: normal;
}
h3 {
font-weight: normal;
font-style: italic;
margin-top: 3em;
}
h1,
h2,
h3{
text-align: center;
}
h2:after{
border-bottom: 1px solid #2f2f2f;
content: '';
width: 100px;
display: block;
margin: 0 auto;
height: 1px;
}
h1+h2, h2+h3 {
margin-top: 0.83em;
}
p,
.mathjax-block {
margin-top: 0;
-webkit-hypens: auto;
-moz-hypens: auto;
hyphens: auto;
}
ul {
list-style: square;
padding-left: 1.2em;
}
ol {
padding-left: 1.2em;
}
blockquote {
margin-left: 1em;
padding-left: 1em;
border-left: 1px solid #ddd;
}
code,
pre {
font-family: "Consolas", "Menlo", "Monaco", monospace, serif;
font-size: .9em;
background: white;
}
.md-fences{
margin-left: 1em;
padding-left: 1em;
border: 1px solid #ddd;
padding-bottom: 8px;
padding-top: 6px;
margin-bottom: 1.5em;
}
a {
color: #2484c1;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
a img {
border: none;
}
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</style><title>ctfAbout</title>
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<body class='typora-export os-windows'><div class='typora-export-content'>
<div id='write' class=''><blockquote><p><span>内容来自CTFwiki , 可以到Wiki上看全部内容 </span><a href='https://wiki.x10sec.org/introduction/content-zh/' target='_blank' class='url'>https://wiki.x10sec.org/introduction/content-zh/</a></p></blockquote><h2 id='ctf-的起源'><span>CTF 的起源 </span></h2><p><span>CTF 的前身是传统黑客之间的网络技术比拼游戏，起源于 1996 年第四届 DEFCON。</span></p><h2 id='早期-ctf-竞赛'><span>早期 CTF 竞赛 </span></h2><p><span>第一个 CTF 比赛（1996 年 - 2001 年），没有明确的比赛规则，没有专业搭建的比赛平台与环境。由参数队伍各自准备比赛目标（自行准备与防守比赛目标，并要尝试攻破对方的比赛目标）。而组织者大都只是一些非专业的志愿者，接受参赛队伍手工计分的请求。</span></p><p><span>没有后台自动系统支持和裁判技术能力认定，计分延迟和误差以及不可靠的网络和不当的配置，导致比赛带来了极大的争论与不满。</span></p><h2 id='现代ctf-竞赛'><span>「现代」CTF 竞赛 </span></h2><p><span>由专业队伍承担比赛平台、命题、赛事组织以及自动化积分系统。参赛队伍需提交参赛申请，由 DEFCON 会议组织者们进行评选。</span></p><p><span>就 LegitBS 组织的三年 DEFCON CTF 比赛而言，有以下突出特点：</span></p><ul><li><span>比赛侧重于对计算机底层和系统安全的核心能力。</span></li><li><span>竞赛环境趋向多 CPU 指令架构集，多操作系统，多编程语言。</span></li><li><span>采用「零和」计分规则。</span></li><li><span>团队综合能力考验：逆向分析、漏洞挖掘、漏洞利用、漏洞修补加固、网络流量分析、系统安全运行维护以及安全方面的编程调试。</span></li></ul><h2 id='content'><span>Content</span></h2><p><span>由于 CTF 的考题范围其实比较宽广，目前也没有太明确的规定界限说会考哪些内容。但是就目前的比赛题型而言的话，主要还是依据常见的 </span><strong><span>Web 网络攻防、RE 逆向工程、Pwn 二进制漏洞利用、Crypto 密码攻击、Mobile 移动安全</span></strong><span> 以及 </span><strong><span>Misc 安全杂项</span></strong><span> 来进行分类。</span></p><ul><li><p><strong><span>Web - 网络攻防</span></strong></p><p><span>主要介绍了 Web 安全中常见的漏洞，如 SQL 注入、XSS、CSRF、文件包含、文件上传、代码审计、PHP 弱类型等，Web 安全中常见的题型及解题思路，并提供了一些常用的工具。</span></p></li><li><p><strong><span>Reverse Engineering - 逆向工程</span></strong></p><p><span>主要介绍了逆向工程中的常见题型、工具平台、解题思路，进阶部分介绍了逆向工程中常见的软件保护、反编译、反调试、加壳脱壳技术。</span></p></li><li><p><strong><span>Pwn - 二进制漏洞利用</span></strong></p><p><span>Pwn 题目主要考察二进制漏洞的发掘和利用，需要对计算机操作系统底层有一定的了解。在 CTF 竞赛中，PWN 题目主要出现在 Linux 平台上。</span></p></li><li><p><strong><span>Crypto - 密码攻击</span></strong></p><p><span>主要包括古典密码学和现代密码学两部分内容，古典密码学趣味性强，种类繁多，现代密码学安全性高，对算法理解的要求较高。</span></p></li><li><p><strong><span>Mobile - 移动安全</span></strong></p><p><span>主要介绍了安卓逆向中的常用工具和主要问题类型，安卓逆向常常需要一定的安卓开发知识，iOS 逆向题目在 CTF 竞赛中较少出现，因此不作过多介绍。</span></p></li><li><p><strong><span>Misc - 安全杂项</span></strong></p><p><span>以诸葛建伟翻译的《线上幽灵：世界头号黑客米特尼克自传》和一些典型 MISC 题为切入点，内容主要包括信息搜集、编码分析、取证分析、隐写分析等。</span></p></li></ul><h3 id='全国大学生信息安全竞赛---竞赛内容'><span>全国大学生信息安全竞赛 - 竞赛内容 </span></h3><p><span>2016 年全国大学生信息安全竞赛开始举办创新实践技能赛，采取的就是传统的 CTF 赛制。在《2016 年全国大学生信息安全竞赛参赛指南》中主办方给出的竞赛内容相对全面，值得参考。</span></p><ol start='' ><li><span>系统安全。涉及操作系统和 Web 系统安全，包括 Web 网站多种语言源代码审计分析（特别是 PHP）、数据库管理和 SQL 操作、Web 漏洞挖掘和利用（如 SQL 注入和 XSS）、服务器提权、编写代码补丁并修复网站漏洞等安全技能。</span></li><li><span>软件逆向。涉及 Windows/Linux/Android 平台的多种编程技术，要求利用常用工具对源代码及二进制文件进行逆向分析，掌握 Android 移动应用 APK 文件的逆向分析，掌握加解密、内核编程、算法、反调试和代码混淆技术。</span></li><li><span>漏洞挖掘和利用。掌握 C/C++/Python/PHP/Java/Ruby / 汇编 等语言，挖掘 Windows/Linux（x86/x86_64 平台）二进制程序漏洞，掌握缓冲区溢出和格式化字符串攻击，编写并利用 shellcode。</span></li><li><span>密码学原理及应用。掌握古典密码学和现代密码学，分析密码算法和协议，计算密钥和进行加解密操作。</span></li><li><span>其他内容。包括信息搜集能力，编程能力、移动安全、云端计算安全、可信计算、自主可控、隐写术和信息隐藏、计算机取证（Forensics）技术和文件恢复技能，计算机网络基础以及对网络流量的分析能力。</span></li></ol><p> </p></div></div>
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