Machines become infected when users click on phishing e-mails, designed to try to gain sensitive information, or visit compromised websites, according to security experts.

安全专家称，当用户点击网络钓鱼（phishing）邮件——设计用来获取敏感信息，访问入侵网站——时电脑便会遭受病毒感染。

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Network providers do not guarantee a certain quality of service, but merely promise to do their best. That may not matter for personal e-mails, but it does for time-sensitive data such as video.

网络提供者们不担保某种程度的服务质量，仅承诺将尽力而为，这可能对个人电邮不算什么，但是对时间敏感的数据比如视频就很重要了。

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It has now tightened access to the e-mails and the scope to copy them. Sensitive information will have to receive a higher classification.

目前已经收紧了电子邮件的接驳权限以及复印范围，同时还提高了敏感信息的保密等级。

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Advice: Never use e-mail to convey sensitive information, especially anonymously.

CNN: Test your e-mail etiquette

In recent years, passing on sensitive data points like e-mail addresses and credit card codes to marketing partners has also been a frequent source of corporate data breaches--about 40% of all breach incidents were a result of a third party's handling of data, according to another Ponemon study, released in November 2007.

FORBES: What Privacy Policy?

It encrypts messages, which makes business owners more comfortable giving the phones to their employees, who may share sensitive documents and e-mails over the phones.

CNN: Why people still use BlackBerrys