Digital Security 101
For students and researchers
2025/11/21
Anton Hvornum
Kushal Das
Security vs Privacy
What do I want to protect?
Who do I want to protect it from?
How bad are the consequences if I fail?
How likely is it that I will need to protect it?
How much trouble am I willing to go through to try to prevent potential consequences?
Threat modeling
It is all about habit building
Update your systems/phones/TV/Fridge/Washing Machine
Reboot daily
Cloud is someone else's computer
Passwords
Enable 2 factor authentication (2FA)
Web Browsers
Really?
Demo time
MITM attacks
Chatting applications
https://privatchat.se
Demo time
With whom our phones are talking?
Some things about phones
Open Questions