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That's what XKEYSCORE does, pretty much. The NSA has spent a lot of time working on these sorts of techniques.



No it doesn't - or at least there is no claim I've seen that this is part of XKEYSCORE. It's not mentioned on the Wikipedia page either[1].

However this is an active areas of research in both classified and (presumably) non-classified areas. See for example this search: https://scholar.google.com.au/scholar?q=related:KbJLbpaKfCkJ...

[1] https://en.wikipedia.org/wiki/XKeyscore


Right, the NSA has a bunch of anti-Tor tools that usually are called QUANTUM-whatever. However, correlation of people across different networks is something that XKEYSCORE does. There's also the writing deanonymisation tools that you mention (but there's Anonymouth[1] which could help).

My original point was that OPSEC is hard if you're trying to be a topic expert in a short period of time. You don't need NSA tools to attack someone in that situation.

[1]: https://github.com/psal/anonymouth


In particular, this part:

> It seems that it could be made trivial to narrow down lists of suspects by crunching large data sets that contain stuff like SO questions, AC posts on Slashdot, or responses on HN.

Is what XKEYSCORE does (or at least, it's the interface you use to query the above data sets which are collected as part of PRISM and the other programs).


I've said it before, I'll say it again. Comments like that are why I like HN. I see there is some long reads associated with this subject.

Once again, HN has sent me off into a subject I'd not have found on my own. That's why I like HN as much as I do.




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