Pasting Datetime Data into Excel Workbooks

During a coffee break at a recent Learning Tree course, Excel Data Analysis Training, June C. commented that when she pasted results from the SQL Server Management Studio into Excel “weird things happened.” Well, June, it's actually not weird, but I definitely know what you are talking about. Microsoft Excel and Microsoft SQL Server have […]
Read More ›

Using a Pandas Andrews Curve Plot for Multidimensional Data

Who doesn’t love a scatterplot? Clear and informative, the scatterplot is often one of the very first plots used when starting an exploratory data analysis. Unfortunately, scatterplots are limited to two dimensions, three if you’re using a package that supports 3D plots. This means we can look at the relationships between different columns of data […]
Read More ›

What Is A Digital Signature?

In an earlier post, I promised to explain how hashes relate to digital signatures. Let’s begin with a thought experiment: suppose you have a document you want to protect. Specifically, you want to let others (“recipients”) know that you wrote the document and that it has not been changed by anyone since you wrote it. […]
Read More ›

Beware The Social Engineer

Social engineering is generally considered one of the weakest aspects of organizational security. Attackers know that and cybersecurity professionals know that, but many other folks just don’t “get it”. What is Social Engineering? The Internet Security Glossary entry for “Social Engineering” says it is a: Euphemism for non-technical or low-technology methods, often involving trickery or […]
Read More ›

How do tshark, ngrep, and tcpdump Differ and When to Use Them

What happens on a network has always been an interest of mine. In graduate school in the 1980s, I worked on networking software. Later I used software protocol analyzers such as netwatch (later the commercial LANWatch) to dissect packets. A few years ago I contributed to what is now the Wireshark protocol analyzer. Lanwatch uses […]
Read More ›

Type to search blog.learningtree.com

Do you mean "" ?

Sorry, no results were found for your query.

Please check your spelling and try your search again.