That's using all of her purchasing history. Knowing your customer has visited a ... | Hacker News

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		solarkraft on Nov 1, 2018 \| parent \| context \| favorite \| on: On Hold for 45 Minutes? It Might Be Your Secret Cu... That's using all of her purchasing history. Knowing your customer has visited a competitor's website appears more difficult to me.

pbhjpbhj on Nov 2, 2018 | [–]

DNS providers often know all the websites an IP visited.

hulahoof on Nov 1, 2018 | [–]

If you're a telco this is trivial for your customers.

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