@misc{EURECOM+5132, author = {Francillon, Aurélien}, title = {A systemization of fraud in telephony networks, illustrated by a study of over-the-top bypass}, howpublished = {SSL 2017, Security Seminar at Loria, 7 February 2017, Nancy, France}, year = {2017}, note = {© EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in SSL 2017, Security Seminar at Loria, 7 February 2017, Nancy, France and is available at :}, }