n.密码，暗号，无足轻重的人，无关紧要的东西，(姓名首字母的)拼合字，花押

原形：cipher复数：ciphers

The spy had to decipher the coded message before they could proceed with their mission.
间谍必须先破译密码信息才能继续执行任务。
The ancient manuscript was encrypted using a complex cipher that modern technology struggled to break.
古代手稿使用了复杂的密码，现代技术难以破解。
She used a simple substitution cipher to hide her thoughts in the letter.
她用简单的替换密码在信中隐藏了自己的想法。
Cryptography is a field of study dedicated to creating and analyzing ciphers.
密码学是一门致力于创建和分析密码的学科。
He cracked the code by trial and error, applying various cipher techniques.
他通过反复试验和错误，运用各种密码技巧解开了密码。
The government agency employs skilled cryptanalysts to decode intercepted messages.
政府机构雇佣了专业的密码分析员来解读截获的信息。
In the early days of computing, encryption was crucial for secure data transmission.
在早期的计算机时代，加密对于数据传输的安全至关重要。
They used a one-time pad, a theoretically unbreakable cipher, for their top-secret communication.
他们使用一次性密码本，一种理论上无法破解的密码，进行绝密通信。
The Enigma machine was a sophisticated cipher machine used by the Germans during World War II.
Enigma机是二战期间德国人使用的复杂密码机。
Alice and Bob agreed on a shared secret key to encrypt their private conversations.
爱丽丝和鲍勃商定共享一个秘密密钥，用于加密他们的私人对话。