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Protecting Your Online Privacy
Everybody Wants To Track You &
Nobody Wants To Get Tracked!
Ram Parthasarathy
@ramanujam
ramanuj.me

Saturday, November 9, 13
Privacy

Privacy is an individual’s right to control
the collection, use and disclosure of
personal information

Saturday, November 9, 13
Who Tracks You Online?
• Google, Facebook, Twitter, LinkedIn
• Analytics Tools
• Ad serving companies
• Location based apps & services (run keeper, starbucks, yelp, groupon)
• ISPs, CDNs, Data brokers

Saturday, November 9, 13
Saturday, November 9, 13
Why are you being tracked?
• Advertising is the backbone of many big internet services
• Providing you a better user experience
• Cheap and fast processing power and storage (Big Data!)
• Security & National Intelligence
• Spam, identity theft etc

Saturday, November 9, 13
How is tracking done?

Saturday, November 9, 13
Social Buttons

Saturday, November 9, 13
HTTP Cookies & Flash Cookies

First Party Cookies
vs
Third Party Cookies

Saturday, November 9, 13
Ever-cookies (aka Zombie Cookies)
Ad Tags & Pixels
iFrames

Saturday, November 9, 13
How is this data used?

Saturday, November 9, 13
Relevant Search Results - Good!

IP spoofed with a proxy

Saturday, November 9, 13
Recommendations - Good!

Saturday, November 9, 13
Info based on user action - Good!

Saturday, November 9, 13
Excessive Ad Retargeting - Bad!

Saturday, November 9, 13
Identity Theft, Selling data - Ugly!

Saturday, November 9, 13
How Unique Are You ?

Saturday, November 9, 13
How Unique Are You ?

33 Bits

Saturday, November 9, 13
How Unique Are You ?

33 Bits
There are only 6.6 billion people in the world, so you
only need 33 bits (more precisely, 32.6 bits) of
information about a person to determine who they are.

Saturday, November 9, 13
How Unique Are You ?

33 Bits
There are only 6.6 billion people in the world, so you
only need 33 bits (more precisely, 32.6 bits) of
information about a person to determine who they are.

- Arvind Narayanan, Princeton, http://33bits.org
Saturday, November 9, 13
https://panopticlick.eff.org/
Saturday, November 9, 13
How many trackers?

Saturday, November 9, 13
What can YOU do?

Saturday, November 9, 13
BUT...

Saturday, November 9, 13
Really... What can YOU do?

Know and decide what you want to expose
and what you don’t want to.
Choose the corresponding action.

Saturday, November 9, 13
Some Common Methods
• The basic one - think for a second before you post something on the
internet!
• Disable Javascript (Too aggressive!)
• Disable Third-Party cookies (Default on Safari. Firefox is trying to).
• Check Android App Permissions before you install.
• Use incognito mode.
• Use DuckDuckGo

Saturday, November 9, 13
Browser Extensions	

Ghostery
ghostery.com

Saturday, November 9, 13

Disconnect
disconnect.me

ShareMeNot
sharemenot.cs.washington.
edu/
Thank You!
Questions?
@ramanujam

Saturday, November 9, 13

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Protecting your online privacy