Inaudible sounds used to fingerprint browsers catch AliExpress red-handed
AliExpress was caught using inaudible audio signals to fingerprint visitors' browsers, an outdated but still-active cross-session tracking technique.
Ars Technica reports that AliExpress fingerprinted site visitors by sending inaudible sounds to their browsers, exposing a legacy audio-based fingerprinting technique in commercial use. The method allows persistent tracking despite the technique being widely considered outdated. The finding highlights that legacy tracking methods remain deployed on major e-commerce properties, raising privacy concerns for defenders and privacy teams.
- AliExpress used inaudible audio for browser fingerprinting
- Technique is considered outdated yet remains deployed
- Enables cross-session and cross-device tracking of visitors
- Relevant to privacy teams auditing third-party tracking
- Vendors
- Ars Technica
- Products
- AliExpress
- Victims
- AliExpress users
- Organizations
- AliExpress
From the original article
Is the technique outdated? Yes. Is it still creepy?
By Dan Goodin · arstechnica.com
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