How Can We Create Secure Passwords?

What makes a password secure? We have to keep the bad guys out while letting the legitimate user in. We need to protect authentication and prevent user identity masquerading or spoofing, so it must be impractical for the attacker to guess it. I didn’t say “impossible” because any string could be guessed eventually. But impractical, […]
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Linux Tutorial: Finding Duplicates

What’s the Problem? Someone brought this data de-duplication problem to me: There’s an ever-growing collection of video files. For reasons out of our control, the collection process leads to duplicate uploads. A file will get a unique name, unique timestamp, all its metadata unique, but it’s an identical copy of an existing file that has […]
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Set Up SSH Keys For Easier And More Secure Authentication

This week I will show you how to set up cryptographic authentication. Two Benefits at Once! Security and convenience are usually at odds, an increase in one usually has the collateral damage of driving the other one down. But cryptographic authentication is a rare opportunity to make things both more secure and easier to use. […]
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Using Linux Containers and Docker for Reliable Service

From time to time, I need to access the web server belonging to a company I do some work for. It’s only used by their employees plus consultants like me, so it’s pretty basic. Just enough to get the job done. The main page carries this warning: This web site will be down for maintenance […]
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Make Meaningful Measurements

You never know what something will lead to. I took a quantitative analysis chemistry course back in my undergrad days at Purdue University. Had to take it, I should say. I wouldn’t have chosen it, but I needed a course with associated laboratory session from the science side of the school, as opposed to engineering. […]
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