Secure Interaction Design

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Secure Interaction Design

• Kami Vaniea

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Overview

• Designing secure interfaces
• Design principles
• Firefox extensions
• Cookies
• Phishing
• Tracking

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Overview

• Designing secure interfaces
• Design principles
• Firefox extensions
• Petname
• Add N Edit Cookies
• Cookie Culler
• Cookie Button
• Distrust
• X Paranoia

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Secure Interaction Design

• Designing a computer system to protect the
  interests of its legitimate user

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Problems

• Viruses
• Spyware
• Phishing
• Online tracking
• Unintentional disclosure of information

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Mental Models

• For software to protect its users interests, its
  behavior should be consistent with the users
  expectations.

What the user thinks is happening
What is really happening
What is shown in the interface
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Designation vs. Admonition

• Security by designation
• When a user designates an action, take
  appropriate security related actions
• Double clicking a Word document
• Security by admonition
• Provide notifications that the user looks at and
  takes appropriate action from
• Display a warning when the user tries to do
  something dangerous

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Design Principles

• Know your audience
• Think like your audience
• Eliminate clutter
• Eliminate complexity
• Create just enough feedback
• Be a customer advocate when usability and
  competitive pressure collide

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Know Your Audience

• Who are they?
• What skills do they have?
• If you dont know who they are you cant think
  like them
• If your product doesnt match your audience then
  it will not do as well as it could have

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Think Like Your Audience

• Present your design to other people to get
  feedback
• Think of a representative of your audience and
  design for them
• Could my mother use this?

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Eliminate Clutter

• Think about the tasks the user needs to perform
• If a word or button is not necessary to those
  tasks then remove it

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Eliminate Complexity

• Again what are the tasks the user needs to
  perform
• Dose your design allow them to complete these
  tasks in the simplest manner
• Design for the common tasks, dont sacrifice
  usability of common tasks for usability of rare
  or unlikely tasks

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Create Just Enough Feedback

• Users just want it to work
• If it can be done safely without their
  involvement do it
• They want to be reassured it is working in
  unobtrusive ways

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Be a Customer Advocate When Usability and
Competitive Pressure Collide

• Its your job to make sure that customers dont
  suffer from poor design
• Be willing to compromise with developers if it
  gets a better interface

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Questions
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Overview

• Designing secure interfaces
• Design principles
• Firefox extensions
• Petname
• Add N Edit Cookies
• Cookie Culler
• Cookie Button
• Distrust
• X Paranoia

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Firefox

• A free web browser
• Browse the Web with confidence - Firefox
  protects you from viruses, spyware and pop-ups.
  Enjoy improvements to performance, ease of use
  and privacy.3
• www.getfirefox.com

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Firefox Extensions

• Extensions are small add-ons that add new
  functionality to Firefox. They can add anything
  from a toolbar button to a completely new
  feature. They allow the application to be
  customized to fit the personal needs of each user
  if they need additional features, while keeping
  Firefox small to download. 2

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Firefox Extensions
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Firefox Extensions
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Anti-Paranoia

• Takes all your doubts and gives you confidence.
  Especially if you are working on security, you
  might get the feeling that your part of something
  really big and maybe even evil.How can your
  extension help me? It will pop up calmative
  messages for you to feel relaxed while browsing
  the web. No, this extension will not spy and
  destroy your personal data, remember Everything
  is good!

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Petname

• Need help avoiding phishing and spoofing
  attacks? The petname tool can help you avoid
  online fraud by clearly distinguishing your
  online relationships.Using the petname tool,
  you can save a reminder note about a relationship
  you have with a secure site. The petname tool
  will then automatically display this reminder
  note every time you visit the site. After
  following a hyperlink, you need only check that
  the expected reminder note is being displayed. If
  so, you can be sure you are using the same site
  you have in the past. 1

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Petname
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Petname
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Petname
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Cookies

• A cookie is a small file downloaded by your web
  browser that is used to identify you to a
  website.

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Cookie Examples

• Doubleclick.com
• id80000060da01136doubleclick.net/10243237971202995
  7155287164811229736878
• Sun
• SUN_ID128.2.141.10349701134167353sun.com/15362447
  9276803122654586416876829752592

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Cookies

• Convenient
• Automatic login
• Personalization
• Session information
• Not so Good
• Usage tracking
• Targeted ads
• Unwanted logins

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Firefox Cookie Settings
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Add N Edit Cookies

• Cookie Editor that allows you add and edit
  "session" and saved cookies.

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Add N Edit Cookies
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Add N Edit Cookies
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Design Principles

• Know your audience
• Think like your audience
• Eliminate clutter
• Eliminate complexity
• Create just enough feedback
• Be a customer advocate when usability and
  competitive pressure collide

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Cookie Culler

• Extended Cookie Manager--protect/unprotect
  selected cookies

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Cookie Culler
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Cookie Button in the Status Bar

• Button for easy access to cookie permissions in
  the status bar. For those who have been asking
  for cookie button in the status bar.

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Cookie Button in the Status Bar
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Cookie Button in the Status Bar
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Distrust

• Hide surfing trails that the browser leaves
  behind.AKA Private Browsing.Once turned on this
  extension monitors FireFox for its
  activities.Once turned off Distrust will remove
  history items cache and cookies that were used
  during the distrust session.

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Distrust
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Distrust
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X Paranoia

• Adds a paranoia button to the toolbar (clear your
  history, saved form information, passwords,
  download history, cookies, and/or cache with as
  little as two clicks).

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X Paranoia
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Design Principles

• Know your audience
• Think like your audience
• Eliminate clutter
• Eliminate complexity
• Create just enough feedback
• Be a customer advocate when usability and
  competitive pressure collide

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Bibliography

• Petname Firefox Extension https//addons.mozilla.
  org/extensions/moreinfo.php?id957applicationfir
  efox
• Firefox Extensions (https//addons.mozilla.org/ext
  ensions/?applicationfirefox)
• Firefox (http//www.mozilla.com/firefox/)