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Who’s Tracking You? Use This New Service to Find Out

A new service called DecryptAds scrapes and correlates adtech data to reveal the entities tracking users. The service makes it easy to learn about the adtech companies and data brokers that may run ads or harvest data from websites and apps.

By Brian Krebs·Aug 14·krebsonsecurity.com·3 min read

Intelligence analysis by Llama

Who’s Tracking You? Use This New Service to Find Out
Image: krebsonsecurity.com

DecryptAds is a free service that scrapes and correlates adtech data to reveal the entities tracking users. It makes it easy to learn about the adtech companies and data brokers that may run ads or harvest data from websites and apps.

Why it matters

The service is important because it helps users understand who is tracking them and what data is being collected. This information is crucial for maintaining online privacy and security.

Imagine you're browsing your favorite website, and you see ads popping up. But have you ever wondered who's behind those ads and what information they're collecting about you? A new service called DecryptAds helps you find out. It's like a detective tool that looks at the ads and data brokers to see who's tracking you and what they're doing with your information.

Analysis

Adtech Data and Online Tracking

The adtech industry has long been shrouded in mystery, with many users unaware of the entities tracking their online activities. However, a new service called DecryptAds is changing this by scraping and correlating adtech data to reveal the entities responsible for tracking users.

DecryptAds is a free service that allows users to search for specific websites or apps to learn about the adtech companies and data brokers that may run ads or harvest data from them. The service is built on the idea that adtech data is only useful when it can be cross-referenced to build a more complete picture of the advertising ecosystem.

The service is particularly useful for tracking down the source of malicious ads that try to foist malware on targeted users, identifying ad networks located in adversarial nations, and detecting the fast-growing swarms of AI-generated slop websites and apps.

DecryptAds and Adtech Data

DecryptAds reports that almost half of the data brokers listed in the ads.txt and app-ads.txt files for espn.com are collecting geolocation data from visitors who are not blocking ads. Another three disclose that they collect device fingerprints and sensitive personal information.

The service also makes it easy to learn the beneficiaries and national origins of the advertising firms lurking in apps and websites, displaying a conspicuous warning when adtech partners of an app or website are based in "geo-risk" areas like China and Russia, or in countries with strong financial and political ties to both — such as Cyprus and the United Arab Emirates (UAE).

Between Digital and the UAE

DecryptAds reports that espn.com works with four different advertising entities that are based in either Russia, China, or the UAE, including the adtech firm Between Digital. However, the dossier on Between Digital flags them as a Russian firm, showing that their publisher offers (PDF) are processed through Alfa Bank, Russia’s largest private commercial bank and one of several financial institutions placed under U.S. sanctions in 2022 after Russia invaded Ukraine.

Opera and the Chinese Connection

The Opera Web browser remains quite popular, and probably many users are unaware that since 2016 it has been majority owned and controlled by the Chinese company Kunlun Tech. Opera.com’s profile at DecryptAds identifies 27 registered data brokers collecting information, including 15 adtech partners that are based in China.

Conclusion

DecryptAds is an important service that helps users understand who is tracking them and what data is being collected. By scraping and correlating adtech data, the service provides a valuable resource for maintaining online privacy and security.

Key points

  • DecryptAds is a free service that scrapes and correlates adtech data to reveal the entities tracking users.
  • The service makes it easy to learn about the adtech companies and data brokers that may run ads or harvest data from websites and apps.
  • DecryptAds reports that almost half of the data brokers listed in the ads.txt and app-ads.txt files for espn.com are collecting geolocation data from visitors who are not blocking ads.
  • The service also makes it easy to learn the beneficiaries and national origins of the advertising firms lurking in apps and websites.
The Upside

If DecryptAds continues to grow and gain traction, it could lead to a more transparent and secure online advertising ecosystem. This could result in users having more control over their online data and being able to make more informed decisions about who they share their information with.

The Downside

However, there are also risks associated with DecryptAds. For example, if the service is not properly secured, it could be vulnerable to hacking and data breaches. Additionally, if the service is not used responsibly, it could lead to a backlash against online advertising and potentially harm the industry as a whole.

Originally reported at

krebsonsecurity.com

Discernion covers the story. Read the full piece at the source.

Tagsadtechonline-trackingprivacysecuritydecryptads

Author

Brian Krebs

Intelligence analysis by

Llama

Published

Aug 14, 2026

Source

krebsonsecurity.com

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Topics

adtechonline-trackingprivacysecuritydecryptads

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