How to protect your online activities from advertisers

Published Categorized as Tips & Tricks
How to Prevent Advertisers from Monitoring Your Online activities. No internet access icon proxy
How to Prevent Advertisers from Monitoring Your Online activities. No internet access icon proxy

The primary methods of de-anonymizing internet users involve cookies and personal data. Advertisers/websites can assign a unique identifier through cookies to track multiple visits. When combined with personal information, these cookies enable the creation of detailed tracking profiles akin to photo IDs.

Major advertising companies, including Google, Twitter, and Facebook, not only construct these profiles but also embed code snippets in other websites and platforms to monitor your online activities. This mapping can link seemingly unrelated behavior, such as using a different email or VPN, to your actual identity. Protecting against these identification strategies is relatively straightforward:

log out of accounts on platforms like Twitter, Google, and Facebook, and clear your cookies. Utilize browser extensions such as uBlock Origin and Privacy Badger to block third-party cookies and trackers consistently.

Safeguard against browser cookies.

Logging out and clearing your cookies significantly impedes advertising networks from tracking your internet activity, rendering unique identification particularly challenging.

Nevertheless, through browser fingerprinting, advertisers can probabilistically deduce your identity across different websites, inferring your online persona with a certain degree of certainty.

The Mechanisms of Browser Fingerprinting

Browser fingerprinting operates by collecting data about a user’s device, such as screen resolution, operating system, installed fonts, and plugins, to create a unique identifier that can track and identify the user across the web.

This technique leverages the distinct configurations and characteristics of a user’s device to distinguish it from others, even in the absence of traditional tracking methods like cookies.

Refined Panopticlick Tracking Study

Sophisticated fingerprinting methods, notably through Flash, WebGL, and JavaScript, enable websites to construct a highly precise and distinctive profile of your browser and computer.

Explore the EFF’s Panopticlick tool and select “show full results for fingerprinting” to comprehend the extent of potential tracking. The fonts installed on your computer or your operating system may not seem revealing individually, but their unique combination could be singular, making identification straightforward.

For advertisers to utilize browser fingerprinting effectively, it requires browsers to exhibit both diversity and stability; diversity is characterized by a plethora of discernible, variable user parameters, while stability implies that fingerprints remain consistent over time. However, as evidenced by the Panopticlick experiment, browser fingerprints are variable but not completely stable. Altering settings, adjusting your window size, or connecting a new monitor can all modify your browser’s fingerprint.

Canvas Data Employs Innovative Methods to Monitor Your Activity.

A particularly covert browser fingerprinting technique is ‘canvas’ data extraction. Websites prompt your browser to render a concealed image and then analyze the unique ways in which your device processes the drawing task, influenced by hardware variations.

The Tor Browser includes a detection mechanism for canvas data access attempts, allowing users to withhold this information. While canvas data alone has limited utility, when combined with additional data, it can uniquely identify you.

Safeguard against online tracking.

Employing a standard browser with default settings, sans plugins or custom fonts, serves as a robust defense against fingerprinting. Privacy-centric browsers like Tor, when paired with a conventional operating system such as Tails, potentially offer superior protection, though their rarity may inadvertently highlight their use.

Browser fingerprinting, however, is not a paramount concern compared to more prevalent and efficient tracking methods. To safeguard your online privacy, employ extensions like uBlock Origin and Privacy Badger to thwart external trackers and ad networks, disallow third-party cookie setting, and periodically purge your cookies.

Furthermore, it is prudent to access Google or Facebook exclusively through incognito windows and to utilize the Tor Browser regularly for enhanced anonymity.

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