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Openai/6937b8ff-b070-8002-89c2-4f3c35f2c29a
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=== Reality 核心包含三个部分: === ==== Reality 不再使用伪造的网站或自签证书,而是: ==== * 指定一个真实存在的网站域名,如: www.cloudflare.com、www.google.com、www.bing.com * 客户端在 TLS 握手中发送的 SNI,看起来就是访问该站点 * 探测者看到的流量: “某人访问 google.com<ref>{{cite web|title=google.com|url=https://www.google.com/%E2%80%9D|publisher=google.com|access-date=2025-12-10}}</ref> 这个 SNI 无法被阻断,否则就是阻断整个互联网。 ==== 传统代理:TLS 外层 + 内层代理协议(容易被发现) ==== Reality:把认证信息隐藏在 TLS 握手里。 Reality 使用的是 XRay 官方定制的隐形握手算法: * 客户端发送的 TLS ClientHello 完全和 Chrome/Safari 一致 * 在某些 TLS 字段内隐藏认证 token(例如长度、padding、随机数等可利用空间,方式不公开但已开源) * 服务端检测到「暗号」→ 接入代理功能 * 未携带暗号的请求 → 反向代理到真实网站(完全正常的 HTTPS) 因此: 探测者看到的只是一段 正常的 HTTPS 流量,没有内层协议特征。 ==== Reality 不需要自签证书,也不需要从 CA 获取证书,它: ==== * 使用 真实网站的证书链 * 由服务端“透传”(不是伪造) * 因此 TLS 行为完全真实 探测者无法从证书上判断异常,因为证书就是 该网站本身的证书。
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