As the use of tracking tags grows, some people are concerned by the potential environmental impact of the radio-frequency identification devices. Generally the concerns involve recycling the tags. Joe ...

If you’re already worried about ads tracking your online whereabouts, here’s a new thing to freak out over: cross-device tracking that communicates using high-pitched audio frequencies. As reported by ...

Privacy advocates are warning federal authorities of a new threat that uses inaudible, high-frequency sounds to surreptitiously track a person’s online behavior ...