Daily Dose of Common Sense

Progress in technology always brings about new kinds of dangers. Crossing the street must have become a frightening experience for a fair percentage of the folks who lived through the transition from horse-drawn to motorized vehicles, but soon every 5-year old knew enough to look both ways before they cross and pay attention to traffic signals. Education and adapting your behavior are the key.

The security dangers posed by the Internet are no different. By now (hopefully) we’ve all learned not to open email attachments we weren’t expecting (even if they appear to come from friends).

But a newer and more subtle danger is deceptive web links in emails and on web sites. But, like the simple rule about looking both ways, there’s also an easy way to mitigate this danger as well.

The key is to understand that the text of a link doesn’t necessarily have to match the actual web “destination” (the technical term being a URL, Uniform Resource Locator). So, if I want to link to CNN, I can make the link text match (http://www.cnn.com/) or use some other text (CNN).

The malicious links are crafted to appear like that first link that shows the URL as the text (let’s call this a “bare link”), but the actual URL is a different site that is a fake version of the real site shown in the text. So, how can you detect this subterfuge?

Every web browser and email program has a feature that shows you the URL of a link when you hold the mouse pointer without clicking (called hovering) over the text. So, for instance, this fake bare link to Citibank can be easily detected: http://www.citibank.com/

So, anytime a bare link’s destination URL doesn’t match what looks like the URL in the text, don’t click it. It’s as simple and common-sensible as looking before you cross the street.

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They have always been a good idea, but the tough economic times have made more people than ever look into using rechargeable batteries instead of single-use batteries. Once a mystery, we now all routinely use special-purpose rechargeable batteries in devices like cell phones and digital cameras. Like anything else, however, knowledge is power (pun intended), and even a few simple facts can help a lot.

First, let’s deal with the most important issue: safety. NEVER try to charge a single-use battery. Those warnings are not from some overly cautious lawyer; fire and explosions are real dangers. If you don’t believe me, search for battery fire on YouTube and you’ll see that these innocuous-looking little devices are not to be misused. Electricity and chemistry can each be dangerous on their own, and together they are even more so.

Similarly, never use any kind of rechargeable battery that has been damaged in any way. Likewise, don’t try and jury-rig anything; use things as they are intended and according to the instructions. We technology professionals have a humorous acronym for this: RTFM, which stands for (polite version) Read The Freaking Manual! While our arcane knowledge may seem a mystery to most people, and some of us do indeed have a knack for gadgets, it’s mostly due to the fact that we read the darn directions!

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