As Nadella prepares for his keynote speech in France, his chief of staff, a towering Princeton man who could double as a chief of security, stands guard outside the door.

就在纳德拉准备在法国发表主旨演讲的时候，他的首席助理兼首席保镖，一位身材高大的普林斯顿人，站在门外守卫。

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"Each magstripe has three tracks of information," explains payments security expert Jeremy Gumbley, the chief technology officer of CreditCall, an electronic-payments company.

电子支付公司 CreditCall 的首席技术官、支付安全专家杰里米·冈布利解释说：“每个磁条都有三条信息轨迹。”

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The contract also supports ASC’s Deputy Chief of Staff for Intelligence and Security, the officials said.

该合同还支持ASC情报和安全局的副参谋总长。

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Despite the military's superiority in numbers, former security chief of the tribal regions,Mahmood Shah, tells VOA it will not be an easy battle.

VOA: standard.2009.10.17

The National Security Advisor and the Chief of Staff were also there.

国家安全顾问和,办公室主任也会参与其中。

普林斯顿公开课 - 国际座谈会课程节选

Former security chief of the tribal areas Mahmood Shah talked to VOA about the development.

VOA: standard.2009.10.24

"Once they're in the door, they're in their element, " says the chief of security that night at Portico, Jonathan Mills.

CNN: IN THE GRIP OF ECSTASY

Asadullah Khalid, chief of security for southern Afghanistan and another Ghazni native, is suspected of trying to take control of the uprising.

ECONOMIST: Villagers take the counterinsurgency into their own hands

The Egyptian chief of security forces was replaced on Friday to try to defuse anger among police, an interior ministry official told BBC Arabic.

BBC: Egypt police withdraw from Port Said