intimate friends [friendship]
密友 [亲密的交情]
Article9. State secrets shall fall into three categories: most confidential, classified and confidential.
第九条国家秘密的密级分为“绝密”、机密”、秘密”三级。
keeping a secret or furtive watch.
密密的偷偷摸摸的观察。
close association
亲密的关系，密切的联系
Confidential or secret information.
内幕绝密或秘密的消息
density:The quality or condition of being dense.
浓密:浓密的质量或情况.
To designate(a document, for example)as confidential, secret, or top secret.
归入机密级别指定（如文件）为机密、秘密或绝密的
Cryptographic Workflow Key Encapsulation Mechanism Based on Signcryption
基于签密的密码工作流密钥封装机制
Conversely, plaintext encrypted with the private key can be decrypted only with the public key.
相反，用秘密密钥加密的普通文本只能由公开密钥解密。
Having or appearing to have the close relationship of chums.
亲密的，要好的有或显示出密友般亲密关系的
In a public-key cryptosystem, plaintext encrypted with the public key can only be deciphered with the private key from the same pair.
在公开密钥密码系统中，用明匙加密的普通文本只能由同一对钥匙中的秘密密钥解密。
(4) any declassification of secret patents;
（四）保密专利的解密；
a plot intended to subvert another plot.
为推翻另一密谋的密谋。
Smith? 6079, Smith, W,?
史密斯，6079号的温史密斯？
No encryption key is available. A well-known encryption key was returned.
没有可用的加密密钥。返回了一个已知加密密钥。
undercover agents,activities,organizations
密探、秘密活动、进行秘密活动的组织
The study of cryptanalysis or cryptography.
密码学研究密码分析或密码学的学科
densely/thickly/sparsely/thinly populated regions
人口密度大[稠密/密度小/稀疏]的地区.