AliExpress Found Using Hidden Audio Signals to Track Website Visitors
Chinese e-commerce platform AliExpress has been caught using a covert audio fingerprinting technique to track users visiting its website. The method works by analyzing inaudible audio signals that web browsers process, without the user's knowledge. Security researcher Matthew Callaghan uncovered the practice after noticing unusual behavior with his phone's audio playback. Both Firefox and Chrome browsers have since introduced safeguards to counter this particular tracking method. AliExpress was also found to be using several other tracking techniques in addition to the audio-based approach.
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