@misc{EURECOM+5775, author = {Sahin, Merve and Francillon, Aurélien}, title = {Exploring fraud in telephony networks}, howpublished = {35C3 2018, 35th Chaos Communication Congress, 27-30 December 2018, Leipzig, Germany}, year = {2018}, note = {© EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in 35C3 2018, 35th Chaos Communication Congress, 27-30 December 2018, Leipzig, Germany and is available at :}, }