First attempt to talk serious about social engineering

A QR code is just a URL a human can’t read with their eyes. That’s exactly why attackers love it: mail filters check links in text, but don’t always recognize a picture.

Nmap is the main network reconnaissance tool. Below are the flags you need 90% of the time. Only scan your own systems or ones you have written permission for.

Fast hash functions (MD5, SHA-1, SHA-256) are built to be fast. For passwords that’s a downside: a GPU tries billions of guesses per second.