什么是加密系统？(an encryption system?)

加密是对数据进行编码或加密以确保其安全的科学或系统。单词encryption来自前缀en，意思是“使处于”和根crypt，根crypt是从cryptic和cryptography等单词中抽象出来的，因此encryption可以类似于现有的单词encode。加密的反面是解密，正如编码的反面是解码。加密系统是对消息进行加密和解密的标准化方法。...

Encrypted pages have "https" instead of just "http."

使用加密系统可以提高隐私和安全性。即使有人掌握了密文，也不容易阅读。此外，加密数据有助于确保数据在传输过程中不被更改。此外，还建立了用于身份验证的加密系统，这意味着系统将验证消息发送者的身份以及他或她参与某些类型活动的权利，例如使用特定名称和帐户启动信用卡购买。最后，加密系统提供了一种保证，即声称的发送者不可否认地对消息的起源负责。

Encryption system encode plain text for security.

有几种重要的加密系统用于网络加密。一方面，有对称密钥加密系统，也称为密钥加密（SKC）。该系统仅使用一个密钥对数据进行加密和解密。最初的对称密钥加密系统使用数据加密标准（DES），后来被高级加密标准（AES）取代。

另一种主要类型的加密系统是非对称或公钥加密系统，也称为公钥加密（PKC）。公钥方法使用一对密钥，一个用于加密数据，另一个用于解密数据。该系统使用证书颁发机构（CA）颁发的数字证书进行验证，CA是受信任的第三方。

公钥加密系统通过安全套接字层（SSL）和传输层安全性（TLS）实现。TLS的使用导致网页地址为“https”，而不是简单的“http”，这表明该页面的数字证书已被验证，并且通过该页面处理的数据将被加密。如果数字证书未通过验证检查，具有良好安全性的浏览器将向用户提供各种警告。

发表于 2021-12-11 11:41
阅读 ( 173 )
分类：互联网

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