A WEEK TO REMEMBER THE IMPACT OF BROWSER WARNING STORAGE POLICIES - PowerPoint PPT Presentation

Jun 02, 2023 •243 likes •650 views

A WEEK TO REMEMBER THE IMPACT OF BROWSER WARNING STORAGE POLICIES JOEL WEINBERGER & ADRIENNE PORTER FELT When someone clicks through an HTTPS warning, how long should the browser store that decision for? WHY DO WE CARE? REAL FALSE

A WEEK TO REMEMBER THE IMPACT OF BROWSER WARNING STORAGE POLICIES JOEL WEINBERGER & ADRIENNE PORTER FELT
When someone clicks through an HTTPS warning, how long should the browser store that decision for?
WHY DO WE CARE?
REAL FALSE ATTACK: ALARM: forget the save the decision decision as soon as as long as possible possible
REAL FALSE ATTACK: ALARM: forget the save the decision decision as soon as as long as possible possible
REAL FALSE ATTACK: ALARM: forget the save the decision decision as soon as as long as possible possible
WHICH STORAGE POLICY SHOULD CHROME USE?
NO CLEAR CONSENSUS Chrome 44 Windows Browser session Firefox 44 Windows Permanent (or session) Safari 9 Mac Browser session Safari 9 iOS Permanent UC Browser 10 Android Browser session UC Browser 2 iOS Permanent Edge 20 Windows Browser session UC Mini 10 Android Never
a good policy should reduce the cost of a mistake & number of false alarms
a good policy should reduce the cost of a mistake & number of false alarms
a good policy should reduce the cost of a mistake & number of false alarms
HOW DO PEOPLE REACT TO DIFFERENT STORAGE POLICIES?
6 EXPERIMENTAL GROUPS
ADHERENCE RATE Rate at which people heed the warning’s advice
EFFECT ON ADHERENCE
REGRET RATE Rate at which people change their minds about a warning
EFFECT ON REGRET
CORRELATED RATES
CHOOSING A RATE Session 1 Day 3 days 1 week 1 month 3 months Adherence 56.35% 63.96% 66.82% 69.88% 74.38% 75.28% Regret 15.98% 15.67% 17.35% 20.59% 25.56% 25.86% Δ Regret - -0.31 1.37 4.61 9.58 9.88
CHOOSING A RATE Session 1 Day 3 days 1 week 1 month 3 months Adherence 56.35% 63.96% 66.82% 69.88% 74.38% 75.28% Regret 15.98% 15.67% 17.35% 20.59% 25.56% 25.86% Δ Regret - -0.31 1.37 4.61 9.58 9.88
the one-week policy is working well in practice
ALSO CLEAR DECISION IF: 1. User asks to forget 2. User clears browsing history 3. Client sees a valid chain
4 LESSONS LEARNED
1. Storage policies have a large effect on adherence
EFFECT IN CONTEXT
EFFECT IN CONTEXT
EFFECT IN CONTEXT
EFFECT IN CONTEXT
2. Storage policies account for difference between Chrome & Firefox
CHROME & FIREFOX
CHROME & FIREFOX
CHROME & FIREFOX
CHROME & FIREFOX
CHROME & FIREFOX
3. Storage policies are confusing
4. Researchers & browsers should study storage policies
A WEEK TO REMEMBER THE IMPACT OF BROWSER WARNING STORAGE POLICIES JOEL WEINBERGER & ADRIENNE PORTER FELT

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