Ad Tracking Service DecryptAds Uncovers Who’s Watching You Online

Ad Tracking Service DecryptAds Reveals Hidden Ad‑Tech Networks

A new free ad tracking service called DecryptAds is pulling back the curtain on the opaque world of online advertising, scraping public ads.txt, app-ads.txt and buyers.json files to map who can place ads or harvest data on any site or app.

“We built it from a security angle, not just marketing,” says Zach Edwards, chief research officer at DecryptAds.

The platform cross‑references thousands of entries, turning disparate lists into a coherent supply‑chain view. For example, a search on espn.com uncovers ↑ 143 ad partners and 19 data‑broker domains, while the same tool flags that ↓ 55,000 partner sites funnel data through the Russian‑linked firm Between Digital. Geo‑risk alerts highlight entities based in China, Russia, the UAE and other high‑surveillance jurisdictions, warning users of potential state‑backed exposure. The service also logs “quiet removals” when exchanges silently drop suspicious sellers, a practice that previously hid fraud from public view. Researchers can dive deeper via DecryptAds’ Legal Dossier, which reveals ownership, registration dates and hidden affiliations, as illustrated by the Fengwo Group’s network of AI‑generated slop sites that masquerade as mobile browsers to click ads. Malvertising now thrives on these low‑quality farms, bypassing traditional safeguards and delivering malware to unsuspecting visitors. Edwards stresses that broader adoption of the industry’s “Supply Chain Object” (SCO) would let defenders trace every intermediary in a bid request, pinpointing the exact culprit behind a malicious ad. For those seeking immediate protection, ad blockers like uBlock Origin or network‑level tools such as Pi‑hole remain effective, though they cannot stop data harvesting embedded in native mobile apps. Reuters and Bloomberg have reported a surge in ad‑tech scrutiny, underscoring the timeliness of DecryptAds’ mission to bring transparency to a market long shrouded in secrecy.

Analysis by: Nova Stirling

Aerospace & Space Tech Correspondent