今天有三個主角，分別是「艾倫圖靈 (Alan Turing)」「密碼學 (Cryptography)」「Prime」。

Alan Turing - The father of computing theoretical computer science and artificial intelligence

Cryptography - the practice and study of techniques for data protection

Prime - word usage in "ancient literature", "business" and "education".

科普密碼學，深入聊聊英文單字 Prime 絕對沒聽過的用法。