Usable Encryption

Previously

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

Today

• 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

Discussion