Challenge/Response is a spam-fighting technique that forces you to prove you're human before your message will be delivered. It's controversial, to say the least.

Email spoofing is rampant. Spammers often send email that looks like it came from you, and there's little that you can do about it.

A zero-day attack is very simple: it's the exploitation of a vulnerability before there's a fix for it. I'll review the timeline.

An "invalid system disk" error has several possible causes. Two of them will make you hope you backed up recently.

While it's not typically easy, your internet traffic can be monitored at or near your router. I'll look at how this might be done.

So-called "supercookies" and "evercookies" track the websites you visit, even if you regularly disable or flush normal cookies.

Wherein we consider how much information we "give away" in our daily lives online.

A picture is worth a thousand words, and a screenshot - an image of your computer screen, saved as a picture - can eliminate a lot of frustration when trying to describe to someone what you're seeing on your computer.

Incognito mode, or Private or InPrivate browsing, protects your privacy to a point. It's critical to know where that point is.

DRM is digital copyright protection. Unfortunately, it's both imperfect and annoying.