Usable security

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Talk written in partnership with Guy Podjarny When a user opens Facebook, he wants to post a picture. When she logs into her bank, she wants to see her balance. For our users, security is not front of mind. If it gets in their way – they’re likely to look for a shortcut or skip it entirely. And yet, we consistently push security decisions to users, ranging from passwords to security warnings, usually resulting in an experience that’s neither usable nor secure. This talk shares examples that aspire to solve the problem, best practices, and discusses how to provide a secure experience that doesn’t alienate users.

Design

USABLE SECURITY
RACHEL SIMPSON (@RILAN) & GUY PODJARNY (@GUYPOD)

FOR DIGITAL SECURITY, THE STAKES
HAVE NEVER BEEN HIGHER.

RACHEL SIMPSON
@RILAN
GUY PODJARNY
@GUYPOD

USABLE SECURITY
WHAT’S ON THE AGENDA?
▸ Why do people do what they do?
▸ Passwords
▸ HTTPS errors
▸ SSL Interstitials
▸ Phishing
▸ Takeways

USABLE SECURITY
HUMAN FACTORS
▸ Memory
▸ Attention

USABLE SECURITY
HUMAN FACTORS
▸ Memory
▸ Attention
▸ Cognitive load

USABLE SECURITY
HUMAN FACTORS
▸ Memory
▸ Attention
▸ Cognitive load
▸ Previous context

130 ACCOUNTS PER
AMERICAN USER
BLOG.DASHLANE.COM

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WE USE PASSWORDS THAT ARE HARD
FOR HUMANS TO REMEMBER,  
BUT EASY FOR COMPUTERS TO GUESS
XKCD
WWW.XKCD.COM/936

FROM SPLASH DATA’S WORST PASSWORDS OF 2015
ATTACKERS ENUMERATE USERNAMES WITH COMMON PASSWORDS
▸ 123456
▸ password
▸ 12345
▸ 12345678
▸ qwerty
▸ 123456789
▸ 1234
▸ baseball
▸ dragon
▸ football

ATTENTION IS FOCUSED
ON THE TASK AT HAND

63% CONTINUED
THROUGH THE WARNING
EXPERIMENTING AT SCALE WITH GOOGLE CHROME’S SSL WARNING

38% CONTINUED
THROUGH THE WARNING
EXPERIMENTING AT SCALE WITH GOOGLE CHROME’S SSL WARNING

THERE’S NO PATCH FOR HUMAN
STUPIDITY
Trolls
GENERAL INTERNET WISDOM

23% AVERAGE OPEN
RATE
THREATSIM STATE OF THE PHISH STUDY

11% AVERAGE CLICK
THROUGH RATE
THREATSIM STATE OF THE PHISH STUDY

USERS DO NOT GENERALLY PERCEIVE
THE ABSENCE OF A WARNING SIGN.
Chrome Security Team
MARKING HTTP AS NON-SECURE

OUR LAST PHISHING
EXAMPLE
GUY GETS PHISHED

BE MORE FLEXIBLE
BE TIMELY & MEANINGFUL
OFFER AN OPINION
USABLE SECURITY

BE MORE FLEXIBLE
BE TIMELY & MEANINGFUL
USABLE SECURITY

WE’RE HIRING!
RACHEL SIMPSON
@RILAN
GUY PODJARNY
@GUYPOD

USABLE SECURITY
RESOURCES
▸ Transforming the ‘weakest link’ – a human/computer interaction approach to usable and effective
security (M A Sasse, S Brushoff, D Weirich)
▸ Learning from “Shadow Security” (Iacovos Kirlappos, Simon Parkin, M. Angela Sasse)
▸ Users are not the enemy (Anne Adams, Martina Angela Sasse)
▸ Experimenting at scale with Google Chrome’s SSL Warning (Adrienne Porter Felt, Hazim Almuhimedi,
Sunny Consolvo)
▸ Improving SSL Warnings: Comprehension & Adherence (Adrienne Porter Felt, Alex Ainslie, Robert W.
Reeder, Sunny Consolvo, Somas Thyagaraja, Alan Bettes, Helen Harris, Jeff Grimes)
▸ The Emperor’s New Security Indicators (Stuart E. Schechter, Rachna Dhamija, Andy Ozment, Ian
Fischer)

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