PDF files include a variety of security options - from access restrictions to electronic signatures - that help protect sensitive company information.

PD F文件包括多种安全选项——从访问限制到电子签名——帮助保护敏感的公司信息。

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A Microsoft Research team led by Helen J. Wang has created Gazelle (PDF), a browser-based OS, with the declared intent to tighten security when going online.

由Hellen J.Wang带领的一个微软研发团队提出了浏览器上的操作系统 Gazelle(PDF)，目的是加强网上冲浪的安全性。

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Meanwhile, Jed Rubenfeld of Yale Law School has tried to reinterpret (.pdf) the Fourth Amendment not in terms of privacy, but in terms of security.

同时，耶鲁法学院的Jed Rubenfeld 也试图从安全感而非隐私的角度重新解释第四修正案。

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If you do not have a Social Security Number for your dependent, and your dependent qualifies for a Social Security Number, you need to file a form SS5, Application for a Social Security Card (downloads as a pdf), with the Social Security Administration (SSA).

FORBES: Ask The Taxgirl: Social Security Numbers for Dependents

The study, entitled Mapping a National Security Failure: The Ratification of the New START Treaty (PDF), was authored by Center Vice President Ben Lerner.

CENTERFORSECURITYPOLICY: Center For Security Policy

Meanwhile, another report (PDF) from the National Intelligence Council, released in February, warned of security threats due to water issues.

FORBES: Water Risk Threatens Businesses, National Security