Call signs , code words , today's encryption keys!是什么意思？

Call signs , code words , today's encryption keys!

呼叫代号、暗语 、 还有今天的密钥!

call

v. 呼唤，喊叫，召唤，叫来，召集，下令，命令，打电话给；n. 喊叫，大声喊，电话联络，必要，理由，要求；

例句
Romania's government issued a last-minute appeal to him to call off his trip.
罗马尼亚政府最后一刻恳请他取消行程。

signs

n. 手势( sign的名词复数 )，[医学]征，标记，招

例句
The fabric was showing signs of age...
这块衣料可以看出岁月留下的痕迹。

code

n. 行为准则，代码，密码，法典，信号；vt. 将…译成电码，编码，加密；vi. 为…编码，指定遗传密码；

例句
...a Code of Practice that would give patients right of access to their medical records.
允许病人查看自己病历的职业准则

words

n. 字( word的名词复数 )，（说的）话，诺言，口令；

例句
She felt as if his words had granted her absolution.
她感觉他的那番话好似给她下了道赦令。

encryption

n. 编密码，加密；

例句
The module of data encryption adopts Advantaged Encryption Standerd ( AES ).
本文的数据加密模块主要采用高级加密标准 ( AES ).

keys

n. （乐曲的）调( key的名词复数 )，钥匙，键，题解；

例句
George took out a bunch of keys and went to work on the complicated lock.
乔治掏出一串钥匙，上前去鼓捣那把结构复杂的锁。