My doctor kept my treatment quiet to keep from tarnishing my record and to protect my Top Secret security clearance.

我的医生就没将治疗记录在案，为了不是我的档案蒙受污点，同时，也是为了在过渡机密安检中保护我。

youdao

It's an open secret that the security service bugged telephones.

安全部门窃听电话是一个公开的秘密。

《柯林斯英汉双解大词典》

The user supplies a secret key (password) to the security server to prove its identity.

用户向安全服务器提供一个秘密密钥（密码）来证明其身份。

youdao

Holbrooke's location in Pakistan personally coming here is a closely guarded secret, given the heightened security concerns following deadly terrorist attacks in Lahore and Peshawar,last week.

VOA: standard.2009.06.03

With a top-secret security clearance, he received one-on-one briefings by a CIA officer every two weeks on average.

CNN: Campaign Finance: The Show Begins

This notwithstanding serious questions raised about Mr. Islam's public biography, conduct in relation to Muslim outreach, the Coughlin affair and his top secret security clearance.

CENTERFORSECURITYPOLICY: The Coughlin affair

Before the election in an unprecedented move about 100 people from teams for Obama and for Republican John McCain were given top-secret security clearances.

NPR: Who's At The Top Of Obama's Schedule?