关于TLS混淆，V2Ray用的是真TLS，即完全符合TLS协议；Shadowsocks的obfs和SSR的TLS混淆用的均为假TLS，即只模拟了部分TLS协议。真TLS的优势是服务器端防探测，第三方用任意的TLS数据包探测，V2Ray都能做出合理的响应，而假TLS则带有明显的特征。真TLS会有首次连接时进行一个两次通信(2-rtt)的握手，比起假TLS略慢，但之后的连接中，由于使用了缓存，握手不会有性能差异。
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A project of our size needs at least a few hundred million dollars per year to keep going,” Mr. Durov wrote in his public channel on Telegram late last year. “While doing that, we will remain independent and stay true to our values, redefining how a tech company should operate.
Telegram has no known backdoors and, even though it is come in for criticism for using proprietary encryption methods instead of open-source ones, those have yet to be compromised. While no messaging app can guarantee a 100% impermeable defense against determined attackers, Telegram is vulnerabilities are few and either theoretical or based on spoof files fooling users into actively enabling an attack.
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