Translator Reviews ( Chinese (Traditional) → English )

Additional info: 密文：（Ciphertext / Cyphertext）
明文：Plaintext
密碼學：Cryptography
中國式密碼：（Chinese Cipher）
「謎」式密碼機：（Enigma）

主要為科普文章，圖片部分可以參考自此：https://medium.com/@tih/%E6%88%91%E5%92%8C%E4%BD%A0%E7%9A%84%E5%B0%88%E5%B1%AC%E5%AF%86%E8%AA%9E-5982868d0724

Chinese (Traditional)

當密文長度足夠，也可以採用「頻率分析」。先計算密文中每個字母出現的頻率，再將此頻率與正常情況下該語言的字母出現頻率比較。例如，在一般的英文中，E和T出現的頻率特別高，而Q跟Z的出現頻率特別低，我們可以透過計算密文中的字母出現率，推估正確的偏移量。頻率分析不只可應用於字母，也可用在單詞。例如，英文中，出現頻率最高的單詞有the、of、and⋯⋯等等，我們可以將這些單詞的二十五種偏離量的密文編成字典，以此對密文進行分析。

English

If the ciphertext is long enough, "frequency analysis" is also a technique. First, graph the frequencies of letters in the ciphertext, then match those letters to the expected distribution of them in the original language of the plaintext. For example, in the English language the plaintext frequencies of the letters E, T, and Q, Z are particularly distinctive. It is possible to determine the shift by examining the resultant frequency of the alphabets in the ciphertext. Frequency analysis can not only be applied to alphabets, but also to words. For example, the most commonly used words in English are "the", "of", "and"...etc. We can make a dictionary of those words with 25 different shift parameters, to analyze the ciphertext.