His possession of classified documents in his home was, at the very least, a violation of navy security regulations.

他把机密文件放在家里，这最起码是违反了海军安全条例。

《柯林斯英汉双解大词典》

He has a security clearance that allows him access to classified information.

他有安全许可，这准许他接触机密。

《柯林斯英汉双解大词典》

Booz Allen does not seem to have done its homework-which is embarrassing for a security contractor working with classified materials.

博斯·艾伦貌似措手不及，这对一个要跟机密材料打交道的安全承包商而言，实在尴尬。

youdao

Sensitive Compartmented Information is information that not only is classified for national security reasons as Top Secret, Secret, or Confidential, but also is subject to special access and handling requirements because it involves or derives from particularly sensitive intelligence sources and methods.

CNN

We condemn in the strongest terms the unauthorized disclosure of classified documents and sensitive national security information.

FORBES: Washington Scrambles To Limit Damage Wrought By WikiLeaks' Data Dump

Under American law, government documents may be classified only to protect national security.

ECONOMIST: Civil liberties: freedom of speech