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> but unless you happen to also have egress logs it's still a thornier problem to de-anonymize without heavy resources.

It's an easy problem if you control the majority of the nodes. All it takes is throttling traffic on an exit node and watching which inbound traffic is affected. It is cheap for the US to fund the operation of all Tor nodes in return for the massive intelligence boost it offers.

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At the end of the day, it's a DARPA project originally, I'm sure the US Gov't has been _heavily_ invested in monitoring it for a while. Still I'd argue when doing anything on the web the behemoth that is the US could probably flex some of that spending muscle to levy massive resources.

However FBI tracing bomb-threat is probably still not using NSA-level resources... given the whole not our citizens wink wink thing.

> given the whole not our citizens wink wink thing.

Intercepting encrypted domestic communication is fair game as far as the TLAs are concerned. They also always have the option of routing domestic traffic outside the country to make it "foreign origin".

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