服务器Web前端-59.153.63-加密是否有意义

许多读者以为只需运用了https，加密了http的所有字段，服务器整个通讯过程便是安全的了。殊不知，59.153.63.52现如今https通讯并不是端到端(End to End)，而往往是中心夹杂着署理，有客户端的署理，也有服务器端的署理。而署理的存在使得原本较为紧密的、安全的https，存在安全隐患。

客户端署理

通常用户是不知道署理的存在，比如企业为了监控职工https流量，一定会在职工电脑上下手脚，这样企业的网管彻底能够看到职工的https明文流量，其间也包括用户的明文暗码。

服务器署理

通常有服务器的数字证书私钥，能够与客户端建立https加密通讯，自然就能够看到用户的https明文流量，其间也包括用户的明文暗码。

以上两种情况，用户的明文暗码都有泄漏的危险。

一旦前端加密了用户暗码，即便有署理的存在，仍然无法取得用户的明文暗码。

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前端加密用户暗码

不加盐的MD5加密暗码
尽管中心署理无法取得明文暗码，但仍然能够拿着截获的MD5暗码完成登录，这仍然是一个安全隐患。

加盐的一次性暗码OTP
假如每次加密用户暗码时，同时增加随机码Nonce，随机码只运用一次，那么每次发生的暗码便是一次性的、动态改变的。

即便被中心署理截获，也无法第2次登录用户账户。

即便没有中心署理的存在，目前许多https仍然运用RSA算法来完成认证环节、密钥交换(Key Exchange)环节。一旦服务器的私钥泄露，历史上被截获的https加密流量，将会被轻松破解，其间包括用户的明文暗码。

这便是为何TLS 1.3会彻底抛弃RSA算法，做为密钥分发算法的原因，因为它不满意PFS要求。

PFS要求

PFS，Perfect Forward Secrecy，任何一个安全要素的破解，都不能破解全部数据。假如满意这个条件，则为满意PFS要求，否则为不满意。

综上所述，前端加密用户暗码，是为了更好滴保护安全、隐私，即便在https被彻底破解的情况下，相同也能够!

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