Usable Encryption


January 29, 2023


  • What is usable?
  • What methods can we use to understand usability?


  • Usable encryption

UX research methods recap

  • Observations
  • Interviews
  • Surveys
  • User studies
  • Telemetry
  • Diary studies
  • Participatory design
  • Focus groups
  • Experiments
  • Cognitive walkthrough

Case study: usable encryption

The paper

Why Johnny Can’t Encrypt by Alma Whitten and Doug Tygar

Background: encryption

Symmetric vs asymmetric (public key)

Public key encryption basics

Why do we need public-key encryption?

What is PGP?

Encryption/decryption software (mostly for emails)

What does it look like today?

Or maybe this