it is also possible query anything on the local network using a Web RTC workaround + familiar HTTP APIs from an ordinary website
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meaning Facebook, Google, anyone can inventory what is on your network (printer, TV, Fridge, smartphones etc.) from a webpage
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Super target ads -> "We can see your TV is 2 years old, how about this new one"
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and also browser-based malware. Even if there's a firewall between the internet and your LAN, the browser is inside

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I just realised the technique can be used for "place" (LAN) profiling. An extremely dangerous security/privacy breach
End of conversation
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