Update Your Server’s TLS

Everyone wants to browse the web safely. To that end, virtually all web servers use TLS (Transport Layer Security) to encrypt communication with clients. However, older versions of the protocol use insecure encryption techniques and may be weaker protocols, in general. The US NSA has issued guidelines for web administrators to update their servers. It […]
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Learning Through Projects

A familiar quote of teachers and educators is, “we learn by doing.” As a child, my parents used that to encourage me to my math homework. I am sure I am not the only child who experienced that! I prefer a slightly different version of the quote: “we learn by applying.” Some readers of my […]
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Real-life Public Key Encryption (And Why It Matters)

One major topic in Learning Tree Course 468 System and Network Security Introduction is that of encryption. It is a core technology in cyber security because it is used to secure confidential data, as well as protect passwords and the integrity of documents. There are two basic families of encryption used to ensure the confidentiality […]
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Security Should be Simple For the End-User?

“I wish it were easier to turn on security,” grunted my wife through gritted teeth as she tried to configure some security feature in yet another app on her laptop. We can probably all sympathize: if you want to add security to an application, you have to do work upfront and every time you use […]
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Three Measures of Availability in Cybersecurity

In Learning Tree Course 468, Introduction to Cybersecurity, we talk about three core elements of cybersecurity: confidentiality, integrity, and availability. The latter probably gets the least attention. It gets limited attention in Course 450, Introduction to Networking, too. Since availability is an essential pillar of cybersecurity, we’ll look at three important availability metrics here: Uptime […]
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