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TLS的握手过程有一个规律,客户端发出的第一个数据包(称为ClientHello),大约是170字节左右,然后服务器会回复一个数据包(称为ServerHello),大约是70字节左右。之后还有一些交换证书之类的流程,数据包的大小都是有规律的。参考: http://netsekure.org/2010/03/tls-overhead/

尽管加密之后,这几个数据包的内容无法被破解,但它们的长度规律是不会变的。这就成为了一个特征。至于这个特征会不会被墙利用,我们不得而知,当然他们也不会明说。于是为了防范于未然,V2Ray 3.31 中加入了一个实验性功能。

开启方式,在启动 V2Ray 客户端之前设置环境变量 V2RAY_VMESS_PADDING=1 。服务器端自适应,即可以同时接收不同设定的客户端发来的数据。

它的作用是在每一个 VMess 数据包的结尾都添加若干个随机字符,以干扰第三方对于数据包长度的判断。这一功能对连接的吞吐量几乎没有影响(< 3%)。

另外,还可以开启 Mux 把数据包的特征减到最小。



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TLS的握手过程有一个规律,客户端发出的第一个数据包(称为ClientHello),大约是170字节左右,然后服务器会回复一个数据包(称为ServerHello),大约是70字节左右。之后还有一些交换证书之类的流程,数据包的大小都是有规律的。参考: http://netsekure.org/2010/03/tls-overhead/

尽管加密之后,这几个数据包的内容无法被破解,但它们的长度规律是不会变的。这就成为了一个特征。至于这个特征会不会被墙利用,我们不得而知,当然他们也不会明说。于是为了防范于未然,V2Ray 3.31 中加入了一个实验性功能。

开启方式,在启动 V2Ray 客户端之前设置环境变量 V2RAY_VMESS_PADDING=1 。服务器端自适应,即可以同时接收不同设定的客户端发来的数据。

它的作用是在每一个 VMess 数据包的结尾都添加若干个随机字符,以干扰第三方对于数据包长度的判断。这一功能对连接的吞吐量几乎没有影响(< 3%)。

另外,还可以开启 Mux 把数据包的特征减到最小。

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Telegram and Signal Havens for Right-Wing Extremists

Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.

Telegram is riding high, adding tens of million of users this year. Now the bill is coming due.Telegram is one of the few significant social-media challengers to Facebook Inc., FB -1.90% on a trajectory toward one billion users active each month by the end of 2022, up from roughly 550 million today.

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