Research4 min
Encrypting content is easy. Hiding who talks to whom is not.
Notes from designing Orbyte: why metadata is often more sensitive than message content, and the spectrum of defences between 'we encrypt messages' and actual metadata resistance.
- Research
- Web Security
- Cryptography
Research4 min
When being offline is the emergency: designing a reliable dead man's switch
Notes from Batelys on building a lone-worker alert system, where availability is a safety property and a missed check-in has to be as loud as a pressed button.
- Research
- Linux
- Architecture
Article3 min
Building a CTF platform taught me more security than solving CTFs
Running code that is designed to be attacked forces a kind of threat modelling that solving challenges never does. Notes from building Hackuten.
- Web Security
- Research
- Docker