Just a few posts can give a troll’s identity away Janis Engel/EyeEm/Getty
Your scathing restaurant reviews on Trip Adviser might not be as anonymous as you think. Just four geotagged posts are enough to identify an anonymous account from a phone company鈥檚 database of 10 million customers.
In order to effectively route calls to a phone, telecoms companies need to know which cell towers are nearby. In this way, they build up a crude map of each customer鈥檚 movements. A team led by Apostolos Pyrgelis at University College London examined these 鈥渇ingerprints鈥 to see if there was a risk…
