密码学中,密文(英语:ciphertextcyphertext)是明文经过加密算法所产生的。因为密文是一种除非使用恰当的算法进行解密,人类或计算机不可以直接阅读理解的明文的形态,所以可以被理解为加密的信息。解密与加密是相对的,即一种使密文转化为明文的过程。

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