密文是加了密的的文字,明文是加密之前的文字。密文是对明文进行加密后的报文。
n. ciphertext ; cryptograph
明文(Plaintext):加密前的原始信息;算法的输入,可读信息或数据。密文(Ciphertext):明文被加密后的信息;算法的输出。依赖于明文和密钥,对于给定的信息,不同的铭文产生的密文。
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明文(plain text):发送人、接受人和任何访问消息的人都能理解的消息。 密文(cipher text):明文消息经过某种编码后,得到密文消息。 加密(encryption):将明文消息变成密文消息。
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... 已加密金钥 encrypted key 密文 encrypted message 密文部分 encrypted message part ...
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加密文件系统 Encrypting File System ; EFS ; Encrypted File System ; Cryptographic File System
唯密文攻击 Ciphertext-only attack ; ciphertext only ; attack with known plaintext
选择密文攻击 Chosen-ciphertext attack ; chosen ciphertext ; Chosen-Cipher Attack ; ciphertext attack
密文流 stream cipher
保密文件 [计] secret document ; classified document ; confidential document ; classified matter
解密文件 BOOL DecryptFile ; declassified document ; to declassify the documents
亲密文法 Intimate Grammar
加密文字 tekst szyfrowany ; gecodeerde tekst ; Chiffretext ; salateksti
惟密文攻击 Ciphertext Only ; Ciphtext-only attack ; cipher text-only attack ; cybertext only attack
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回想在前面的讨论中说过,CBC 要求密文块链接。
Recall from my earlier discussion that CBC asks for cipher-block chaining.
密钥:密钥是一种在明文与密文之间相互转换的方式。
Key: Key is a means of converting a plain-text into cipher-text and vice versa.
以这种方式继续一块接一块地生成每一个块的密文形式。
You continue chaining blocks in this manner, one after the other, to produce a cipher text form of each of the blocks.
You can brute force it and unfortunately, the so-called Caesar cipher is not very secure because if you assume, for our purposes in English alphabet with 26 characters, say all lowercase for all uppercase, my God, you only have to try like 24, 25, 26 possible rotations until you can figure out what his secret message is.
你可以强行解密但是不幸地是,所谓的凯撒密码不是很安全的,因为如果假设,对于我们的26个字符的字母表,指明所有的小写为大写,我的天,你只要试24,25次,26次就可以解答出,密文的内容。
So one of the things that the Allies very specifically wanted to do in World War II was to hijack one of these devices, take it from a U-boat because if they had this physical machine, certainly can they start decrypting then the German messages.
所以同盟国在二战中想做的一件事,就是劫持其中一个装置,携带在U型潜水艇中,因为如果他们拥有了这种物理装置,他们就可以解码,德国人的密文。
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