According to Zoz in his excellent DEFCON 22 talk "Don't Fuck It Up!"[1] on the difficulties of OPSEC, this type of correlation has been in use for years. >[2]

According to Zoz in his excellent DEFCON 22 talk "Don't Fuck It Up!"[1] on the difficulties of OPSEC, this type of correlation has been in use for years. >[2] Matching entry / exit point – we know specifically they look for that, so don’t match the last use and first use of phones, overlap it. [1] https://www.youtube.com/watch?v=J1q4Ir2J8P8 https://www.youtube.com/watch?v=J1q4Ir2J8P8 [2] http://privacy-pc.com/articles/dont-fuck-it-up-6-opsec-with-phones.html http://privacy-pc.com/articles/dont-fuck-it-up-6-opsec-with-...