Lily Hay Newman, wired.com in Ars Technica, 3 Nov 2016 How to block the ultrasonic signals you didn’t know were tracking you: Your phone can talk to advertisers behind your back, beyond your audible spectrum arstechnica.com/security/2016/11/how-to-block-the-ultrasonic-signals-you-didnt-know-we…
Article Link: http://catless.ncl.ac.uk/Risks/29/91#subj1
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