You might think that connecting anonymously to a public Wi-Fi network doesn’t reveal much about you. You might be using a VPN (virtual private network) to protect everything you do. But even if you aren’t, the vast majority of websites and email servers (and pretty much all those run by companies) use client-to-server encryption. But what if you could be tracked anyway? Apple has a solution for this as it does for many tracking systems. The company’s trick lies
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