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TikTok found to have tracked Android users’ MAC addresses until late last year

Until late last year social video app TikTok was using an extra layer of encryption to conceal a tactic for tracking Android users via the MAC address of their device which skirted Google’s policies and did not allow users to opt out, The Wall Street Journal reports. Users were also not informed of this form of tracking, per its report.
Its analysis found that this concealed tracking ended in November as US scrutiny of the company dialled up, after at least 15 months during which TikTok had been gathering the fixed identifier without users’ knowledge.
A MAC address is a unique and fixed identifier assigned to an Internet connected device — which means it can be repurposed for tracking the individual user for profiling and ad targeting purposes, including by being able to re-link a user who has cleared their advertising ID back to the same device and therefore to all the prior profiling they wanted to jettison.
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