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問答題用Vigenere算法加密明文“We are discovered save yourself”，密鑰是：deceptive。

1.問答題 用Hill密碼加密明文“pay more money”，密鑰是：

2.問答題用Playfair算法加密明文“Playfair cipher was actually invented by wheatstone”，密鑰是：fivestars。