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文字与密码收录字符、符号、编码和密码学相关知识。下列分组展示本分类的内容范围；点击条目名称可阅读具体内容。[[工具和科普|返回科普目录]]。

== 字符与编码 ==
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<div class="mc-knowledge-entry"><strong>[[ASCII编码|ASCII 编码]]</strong><p>基础字符编号与文本表示。</p></div>
<div class="mc-knowledge-entry"><strong>[[Unicode 与 UTF-8]]</strong><p>码点、字节表示、不可见字符与字形差异。</p></div>
<div class="mc-knowledge-entry"><strong>[[Base家族]]</strong><p>以不同字符集表示二进制数据的编码方法。</p></div>
<div class="mc-knowledge-entry"><strong>[[Base16]] · [[Base64]]</strong><p>常见的十六进制与 Base64 表示。</p></div>
<div class="mc-knowledge-entry"><strong>[[A1z26|A1Z26]]</strong><p>字母在字母表中的序号表示。</p></div>
<div class="mc-knowledge-entry"><strong>[[转义与进制]]</strong><p>二进制、十六进制、URL 百分号编码与 HTML 实体。</p></div>
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== 通信符号与文字表示 ==
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<div class="mc-knowledge-entry"><strong>[[莫斯电码]]</strong><p>以点、划和间隔表示字符。</p></div>
<div class="mc-knowledge-entry"><strong>[[ITA2码]]</strong><p>电传打字与字母、数字切换。</p></div>
<div class="mc-knowledge-entry"><strong>[[Code49条形码]]</strong><p>多行条形码的编码形式。</p></div>
<div class="mc-knowledge-entry"><strong>[[盲文、旗语与敲击码]]</strong><p>点阵、手旗位置和敲击坐标等符号体系。</p></div>
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== 古典密码 ==
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<div class="mc-knowledge-entry"><strong>[[凯撒加密]]</strong><p>按固定位置移动字母的替换密码。</p></div>
<div class="mc-knowledge-entry"><strong>[[维吉尼亚密码]]</strong><p>由密钥控制字母替换的古典密码。</p></div>
<div class="mc-knowledge-entry"><strong>[[栅栏密码]]</strong><p>按轨道重新排列字符的换位密码。</p></div>
<div class="mc-knowledge-entry"><strong>[[密码机与单表替换]]</strong><p>机械密码、字母映射和频率分析。</p></div>
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== 现代密码、摘要与校验 ==
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<div class="mc-knowledge-entry"><strong>[[DES]] · [[AES]]</strong><p>对称加密及其分组算法。</p></div>
<div class="mc-knowledge-entry"><strong>[[RSA]] · [[DSA]]</strong><p>公钥密码与数字签名。</p></div>
<div class="mc-knowledge-entry"><strong>[[一次一密]]</strong><p>一次性密钥与理论安全性。</p></div>
<div class="mc-knowledge-entry"><strong>[[MD5]] · [[SHA家族]] · [[CRC家族]]</strong><p>消息摘要和差错检测的不同用途。</p></div>
<div class="mc-knowledge-entry"><strong>[[口令与密钥派生]]</strong><p>口令哈希、密钥材料和验证方式。</p></div>
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== 词语与答案提取 ==
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<div class="mc-knowledge-entry"><strong>[[查词与字母重排]]</strong><p>词典检索、通配符和重排词。</p></div>
<div class="mc-knowledge-entry"><strong>[[位置与顺序]]</strong><p>首字母、行列、索引和多步提取。</p></div>
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