DecryptAds Service Exposes Adtech Tracking Data

A new free service named DecryptAds has launched, designed to simplify the process of identifying entities responsible for displaying advertisements on websites and harvesting data from mobile applications. The service scrapes and correlates publicly available adtech data, providing users with a clear understanding of who is tracking them. DecryptAds aims to democratize access to information traditionally held by large advertising platforms, making it accessible to a wider audience.

The DecryptAds website, decryptads.com, continuously scrapes files that websites and apps make publicly available to disclose companies authorized to run ads or collect user data. These critical files include ads.txt, which lists adtech companies and data brokers permitted to operate on a site; app-ads.txt, detailing entities that can harvest data from or display ads on mobile and smart TV apps; and buyers.json/sellers.json, which identify entities involved in buying, selling, or reselling ad inventory for a specific site or app. By aggregating and cross-referencing information from these disparate sources, DecryptAds builds a comprehensive picture of the advertising ecosystem for each digital property.

Zach Edwards, Chief Research Officer for DecryptAds and a threat researcher at Infoblox, stated that he and two co-founders recognized the need for such a service. They observed that adtech data within these files is typically only valuable when cross-referenced to construct a more complete view of the advertising ecosystem. Edwards emphasized that DecryptAds is an adtech tool approached from a security perspective, built to address significant gaps in privacy and security use cases. The service is intended to assist in tracking the origins of malicious advertisements that attempt to distribute malware, identifying ad networks operating from adversarial nations, and detecting the proliferation of AI-generated content websites and applications.

DecryptAds' functionality extends to providing summaries of advertising partnerships declared by specific websites, as demonstrated by its analysis of espn.com. The service's ability to parse and correlate complex adtech data offers a powerful new resource for researchers, privacy advocates, and concerned users seeking to understand and potentially mitigate online tracking and advertising practices. The initiative aims to bring transparency to a sector often characterized by opacity, empowering individuals with knowledge about their digital footprint and the entities that influence it.