Security experts worry that these types of attacks will become more widespread if mobile phone operators do not make significant changes to their security procedures. (nytimes.com)
The researchers examined the movements of over 2 million anonymous mobile phone users by collaborating with Digicel, the largest mobile phone operator in Haiti. (sciencemag.org)
The work is based on analysing call data records (CDRs) used by mobile phone operators for billing purposes. (sciencedaily.com)