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margin: 20px 0 32px; } noscript .app-crawler-user-stats div { padding: 12px 0; border-bottom: 1px solid #e5e7eb; } noscript .app-crawler-user-stats dt { color: #8b9098; font-size: 13px; } noscript .app-crawler-user-stats dd { margin: 2px 0 0; color: #374151; font-size: 20px; } noscript .app-crawler-user-section { margin-top: 28px; } noscript .app-crawler-user-section h2 { margin: 0 0 12px; color: #111827; font-size: 20px; } noscript .app-crawler-activity-list { margin: 0; padding: 0; list-style: none; } noscript .app-crawler-activity { padding: 14px 0; border-top: 1px solid #e5e7eb; } noscript .app-crawler-activity time { display: block; margin-top: 4px; color: #8b9098; font-size: 14px; } noscript .app-crawler-footer { max-width: 1180px; margin: 24px auto 0; padding: 20px 24px 32px; border-top: 1px solid #e5e7eb; color: #374151; } noscript .app-crawler-footer p { margin: 0; } @media (max-width: 700px) { noscript main { padding: 24px 16px; } noscript .app-crawler-header-inner, noscript .app-crawler-footer { padding-left: 16px; 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公共 WiFi 的风险与自保

红蓝扣风 2026-11-01 2 分钟阅读

公共 WiFi 真正的危险不是"别人能看到我连了什么网站"，而是"我和网关之间、以及我和同网段其他人之间，有没有一条默认加密的通道"。没有这层通道，敏感流量就可能被同网络的设备读到。

风险来自两处

一是非加密链路上的明文流量。早年很多站点只用 HTTP，账号密码在空气里裸奔。现在主流站点默认 HTTPS，风险已被大幅压低，但仍有例外：部分 App 的埋点、图片 CDN、局域网内的设备控制协议仍可能走明文。

二是恶意热点与中间人。攻击者架一个同名或极相似的开放热点，你连上后所有流量先过他的设备。若流量未加密，他就能读；若只是伪造登录页套 credentials，危害更直接。

自保的优先级

最高优先级：用自己的加密通道，不依赖网络本身。手机开热点、或用可信的 VPN 把流量封进一条端到端加密隧道，比纠结"这个 WiFi 正不正经"更根本。在自己的隧道里，即便热点不怀好意，它也只能看到一团密文。

次优先级：确认 App 和网站走 HTTPS。浏览器地址栏的锁标记、证书主体匹配你要访问的域名，是基础校验。对长期使用的服务，可在信任的网络下开启"证书锁定/严格传输安全"类设置，降低被伪造证书降级的风险。

普通浏览、看公开视频，在 HTTPS 全开的前提下风险有限；登录资金账户、填身份证号这类操作，等回到可信网络再做，或走手机流量。

几个具体习惯

不连无密码且不需要任何验证的陌生热点，尤其名字仿冒"机场免费网""Coffee-Free"的。
关掉系统的"自动连已知热点"在无信任环境会误连同名网络，需要时手动连并设为"不自动"。
文件共享、远程桌面等服务在公共网络下默认关闭，避免同网段设备直接探到你的共享目录。
系统和个人防火墙保持开启，把入站默认设为拒绝。

公共 WiFi 不是不能用，关键是把信任从"网络"移到"自己的加密通道"。流量自己加密了，网络是否善意就退居次要位置。

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