AliExpress Accused of Inaudible Audio Fingerprinting Users

AliExpress has been accused of using inaudible audio signals to fingerprint users' devices. This method was discovered by developer Matt Callaghan, who noticed his Bluetooth headphones stopped playing audio when an AliExpress tab was open. The website allegedly generates inaudible audio signals via the Web Audio API, which are processed differently by various devices, creating a unique digital fingerprint. This technique does not involve recording audio but relies on subtle differences in audio processing. The investigation revealed that AliExpress collects additional device information, potentially allowing for precise user identification without cookies. While this method can help detect fraud, it raises concerns about user transparency. Browsers like Firefox and Brave have implemented measures to block such tracking scripts. The issue has garnered attention due to its implications for user privacy and security.

Key Points: • AliExpress allegedly uses inaudible audio signals for device fingerprinting. • The technique does not activate microphones but analyzes audio processing differences. • Browsers like Firefox and Brave have protections against this tracking method.