B. Henne, M. Koch, and M. Smith. 18th International Conference on Financial Cryptography and Data Security (FC 2014), volume 8437 of LNCS, Springer, (2014)
B. Henne, C. Kater, M. Smith, and M. Brenner. Privacy, Security and Trust PST, 2013 Eleventh Annual International Conference on, IEEE, (2013)Implementation: http://bhenne.github.io/android-location-privacy/.