cryptographic

用密码写的

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

The analysis and deciphering of cryptographic writings or systems.

密码分析对密码书写或密码系统的分析和译解