I was reading about one of the new functions that Microsoft has added to Excel, XLOOKUP(), and I started wondering where the different LOOKUP() functions came from. This little rabbit hole turned out to be quite revealing in terms of the way that Excel looks and works - the search took me to some history [...]
In the last several posts we discussed the use of a key to encrypt messages. When both parties have the same keys, these are referred to as "symmetric". Current technology uses symmetric keys for most secure interactions, but we have a problem with getting the key to the computer/person we want to talk to. In [...]
Videoconferencing is fairly old technology now. There have been a variety of expensive commercial systems available, but the system that most people may be familiar with is probably Skype™ by Microsoft. Since 2003 Skype™ has allowed people to see and talk with friends, relatives and colleagues using computers and eventually tablets and phones. The software [...]
This is another in a series of posts about Protective Technologies. Here we are going to continue to examine the use of a key, but a more complex key compared to the last post: Encryption – Part 2 – Using a Key, to encrypt our communications. Encryption has evolved over the centuries and today's encryption [...]
This is another in a series of posts about Protective Technologies. Encryption in any of its forms is, arguably, the most important of the Protective Technologies that help keep us safe while using the Internet. Today's encryption methods are quite sophisticated compared to those of the past, and here we are going to discuss the [...]
Encryption is one of many Protective Technologies that help keep us safe while using the Internet. Today's encryption methods are quite sophisticated compared to those of the past, but before going into more modern methods, let’s look at the general concept. Caesar Cipher: One of the oldest encryption methods require sharing a rule between parties [...]
What is a Data Structure? Part 1 An Explanation Using Tables in Excel 2010 Whether you are just going to look at your data and draw conclusions visually, or you are going to writing a computer program to manipulate it, even a very simple structure can help. When analyzing data, it is useful to decide [...]
Windsong is a companion website and is part of Videre Analytics. This site concentrates on the How-Tos and Tutorials we have developed, courses we offer, and information about on-site training. This web site also serves a number of other purposes: as a reference for workshops, courses and tutorials; as vehicle to post information and how-to [...]
