This presentation was provided by Alison Macrina, Founder and Director, Library Freedom Project, for the NISO Two Part Webinar, Understanding Privacy: What Data Is Being Collected And By Whom, held on March 16, 2016
2. How does invisible tracking work?
1. You visit a website
2. Dozens of domains load in the
background
● Tiny images
● Invisible javascript (code that can run in
your browser)
● Cookies/supercookies
● Web bugs
● Browser fingerprinting
3. Who is doing the tracking?
● Advertisers
● A/b testers
● Analytics
● Social media widgets
What do they know about me?
How long do they keep the data?