cryptographic system的用法和樣例：
例句
- One who uses, studies, or develops cryptographic systems and writings.
加密員使用、研究或改進密碼系統和密碼書寫的人 - A cryptographic system in which units of plain text of regular length, usually letters, are arbitrarily transposed or substituted according to a predetermined code.
密碼一種密碼系統，其中固定長度的明文里的單元，通常為字母，被任意倒置或按事先確定的符號系統替換
