Category: Technology

Learn about technology, both new and old.

The Recent 4G LTE Network Vulnerabilities and Attacks

In this blog post, I'll discuss the design and operation of a 4G LTE network. In hindsight, I realize topics such as these can get extremely lengthy. For that reason, I'll limit this discussion down to only the necessary technical details required to understand these new LTE attacks, while excluding any complicating, non-essentials. These new ...

Wi-Fi Networks to Receive a Massive Security Upgrade: Wi-Fi Alliance Launches WPA3

Yesterday, the Wi-Fi Alliance announced the long-awaited, next generation in Wi-Fi security, WPA3. After 15 years, WPA3 will now begin to replace the existing WPA2 protocol, which is currently used by billions of wireless devices every day. For quite some time, WPA2 has long been considered insecure. It has always been vulnerable to brute force ...

HTTPS: The TLS Handshake Using Diffie-Hellman Ephemeral

A client securely connects to a web server via the TLS 1.2 transport encryption protocol. This is a process that starts with asymmetric cryptography and ends with symmetric cryptography. As a refresher, recall that asymmetric cryptography uses a public and private key pair, whereas symmetric cryptography uses only one shared key. I published a blog ...

What is Snort? Bonus: How to Write Snort Rules!

Snort is an open-source, signature-based Network-based Intrusion Detection System (NIDS). Actually, Snort is much more than just a NIDS because it also acts a packet analyzer and a Network-based Intrusion Prevention System (NIPS). Snort was originally developed to be a packet analyzer, and with such sniffing capabilities, it can be used to detect intrusions on ...