3.6  关键术语

加法密码(additive cipher)                       解密算法(decryption algorithm)
仿射密码(affine cipher)                        两字母组合(digram)
自动密钥密码(autokey cipher)                  双换位密码(double transposition cipher)
分组密码(block cipher)                         加密算法(encryption algorithm)
蛮力攻击(brute-force attack)                    密码机(Enigma machine)
Caesar密码(Caesar cipher)                     穷举攻击(exhaustive-key-search method)
选择密文攻击(chosen-ciphertext attack)           Hill密码(Hill cipher)
选择明文攻击(chosen-plaintext attack)            Kasiski测试(Kasiski test)
密码(cipher)                                 Kerckhoff原理(Kerckhoff's principle)
密文(ciphertext)                              密钥(key)
纯密文攻击(ciphertext-only attack)               密钥域(key domain)
密码分析(cryptanalysis)                        已知明文攻击(known-plaintext attack)
单码性密码(monoalphabetic cipher)              转轮密码(rotor cipher)
单码代换密码(monoalphabetic substitution cipher)    共享密钥(shared secret key)
乘法密码(multiplicative cipher)                  移位密码(shift cipher)
一次一密密码本(one-time pad)                  统计攻击(statistical attack)
模式攻击(pattern attack)                        流密码(stream cipher)
明文(plaintext)                               代换密码(substitution cipher)
Playfair密码(Playfair cipher)                    换位密码(transposition cipher)
多码性密码(polyalphabetic cipher)               三字母组合(trigram)
多码代换密码(polyalphabetic substitution cipher)    Vigenere密码(Vigenere cipher)
栅栏密码(rail fence cipher)                     Vigenere表(Vigenere tableau)