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 […]
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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 […]
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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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