Security at sea: encrypted email

Is there really such a thing as private communications anymore? By long-standing convention, radio traffic (except emergency and "all ships" calls) is supposed to be kept confidential, but these days, I wouldn't put too much faith in that. Public 802.11 wi-fi is also remarkably easy to hack, unless you're on one of the rare networks that use WPA2 encryption and rotate the access codes frequently.

Virtual machines at home: tinkering without the risk

If your computer use and skills fall into the home or work user category, all the hype over "virtualization" has probably gone mostly unnoticed. If you've heard the term at all, it's likely been in the context of something your company is doing with their servers, or perhaps something that a geek friend was fiddling around with. But virtual machines- essentially, complete and independent virtual computers existing within the operating system you're familiar with- can be an incredibly useful tool for home users as well.

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