Unit 3 – Question 3

Video: How you are being tracked in the web | Online Tracking explained


Youtube channel: DW Shift

Level: Year 7 – 9


Video’s content includes:

1. How is user data collected?

The most common tools to collect information about us are so-called cookies. Cookies are tiny files placed on our computer by our browser when we visit the websites. There are 2 types of cookies: Session cookies and Persistent cookies.

Session cookies enable us to move from one part of a website (product page) to another (checkout page) without having to constantly relock in for every page. These cookies are stored only as long as our current session and should automatically be deleted when we lock off our website.

Persistent cookies are placed and stay in our computer. They use primarily by marking firms to track our browsing history. Another method is browser fingerprinting. When we visit a website, besides web server has the ability to transfer a snippet of JavaScript code to the browser. The browser then execute that script on our device. The code can then collect information about installed extensions browser, browser type and name, time zones, screen resolution, ab-lock presence, list of available fonts, computer hardware and many more. JavaScript sends browser fingerprinting to the sides web server where it’s typically stored in a database. Website’s web server is able to read and understand our IP address.

2. What do companies (who build the app) know about us?

Information is collected about us as: gender, age, personal statutes, address and current location, etc… even what music we listen to, which TV series we like, where and what we buy online. Individual profiles are created from this data allow pretty precise conclusions about personal situation. The worst thing about these profile is they are worth a lot of money and they’re being sold to bank, landlords, insurers,…

3. What can we do to prevent tracking?

To reduce the amount of information giving away, we should:

  • Clean internet browsing history and cookies after every use.
  • Use a privacy browser (example: Firefox).
  • Pay attention to apps permission requests. Sometimes, apps ask for more information than they really need.
  • Stop and think before you willfully give away data.


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