North-South
Refers to network traffic between an IT environment and the public internet. Diagrams tend to show the internet above the IT environment.
Obfuscation
The practice of deliberately rendering software obscure, difficult to analyze and reverse engineer, and, above all, difficult to discern its actual function.
Open source
Software whose source code is made available through an open-source license in which the copyright holder grants the right to study, change, and distribute the software for free.
Powershell
A scripting language built into Microsoft Windows that allows for the automation of system administration tasks.