密码系统 的中文句子和英文句子

密码一种密码系统，其中固定长度的明文里的单元，通常为字母，被任意倒置或按事先确定的符号系统替换

A cryptographic system in which units of plain text of regular length, usually letters, are arbitrarily transposed or substituted according to a predetermined code.


密码分析对密码书写或密码系统的分析和译解

The analysis and deciphering of cryptographic writings or systems.