Leaving Your Mark: Thermal Signatures of Passwords Left on Keyboards

We leave evidence of where we’ve been and what we’ve done all over the place. From footprints to DNA, we seldom act without a trace. Our keyboards are no exception. I’m not talking just about fingerprints, DNA, food particles, or skin oils. I’m talking about heat. I saw a movie or maybe a television show […]
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Choosing a Machine Learning Platform That’s Right for You

Choosing a machine learning (ML) platform can be a cause of considerable stress. It’s a major commitment you will have to live with for years and an unwise decision might even affect your job prospects. Fortunately, asking yourself a few fundamental questions can simply the decision considerably. Are you primarily a Windows Shop? In recent […]
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Defense in Depth: It’s for Programmers, Too!

“But, we took care of that before, didn’t we?” asked a participant in a web application security course I taught recently. It was a good, logical question. We were discussing “SQL injection” a process where an attacker enters database commands into a website field – in, say a forum or comment section – that could […]
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Interactive Visio Diagrams in Power BI Reports

When I first evaluated Power BI a few years ago, the thing that impressed me most was that, unlike Sharepoint Power View, a developer could create new visualizations and integrate them into PBI. Some time later, Microsoft greatly expanded the ability of Power BI to include sophisticated graphs by adding to Power BI the ability […]
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Clustering data using k-means in ML.NET

Microsoft recently released a preview of a machine learning framework for .NET developers—ML.NET. I needed to perform a clustering analysis from existing data in one of my applications. This is a pretty common machine learning task, so I decided to document the basic approach in this article. We’ll use the well-worn iris data set from […]
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