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# AliExpress Uses Inaudible Sound Waves to Track Browser Fingerprints
- URL: https://adjacent.media/signals/aliexpress-uses-inaudible-sound-waves-to-track-browser-fingerprints/
- Published: 2026-08-25T16:09:49.000Z
- Updated: 2026-08-25T16:09:49.000Z
- Description: AliExpress deployed ultrasonic fingerprinting—a tracking method that embeds imperceptible audio signals into webpages to create unique device identifiers—revealing how Chinese e-commerce platforms are adopting covert surveillance tactics that Western retailers have largely abandoned due to privacy p
- Author: Jonathan Greene
- Tags: #signal, theme-consumer, privacy, tracking, platform dynamics

Source: [Ars Technica](https://arstechnica.com/security/2026/08/aliexpress-caught-fingerprinting-visitors-after-sending-inaudible-sounds-to-browsers/?ref=adjacent.media)

AliExpress deployed ultrasonic fingerprinting—a tracking method that embeds imperceptible audio signals into webpages to create unique device identifiers—revealing how Chinese e-commerce platforms are adopting covert surveillance tactics that Western retailers have largely abandoned due to privacy pushback. This technique is particularly valuable for high-fraud marketplaces because it persists across incognito browsing and cookie deletion, making it effective against both consumer evasion and regulatory scrutiny. The disclosure exposes a gap in enforcement standards between jurisdictions: European regulations and browser makers have pressured U.S. and EU sites away from aggressive tracking, while platforms operating in less-regulated markets face minimal consequences for deploying fingerprinting methods that remain effective despite their age.