Abstract: The invention relates to a method for controlling scams in which a phone call requests a return call to a target number, comprising the following steps: collecting signalling data of phone calls made via a telephone network (2); detecting suspicious calls from signalling data collected and using a detection algorithm, and for each suspicious call detected, identifying a suspicious number; comparing the suspicious number with a number and/or at least one range of certified target numbers contained in a certification database, and defining a risk profile for the suspicious number accordingly. Methods and systems for controlling phone scams.

Abstract: A method is provided where the method consists of collecting data on telephone communications carried out over a given study period pertaining to roaming and/or interconnection, creating data files for exchange data compilation for each studied number, reevaluating communications based upon pre-established reevaluation rules to obtain a wholesale cost amount for each studied number, identifying suspicious numbers based on wholesale costs exceeding a predetermined threshold value, and detecting fraudulent use by analysis of the compiled exchange data in the created files and/or multi-parametric indicators obtained from the data.

Abstract: The invention relates to a method (100) of detecting a “soliciting” telephone number that is being used fraudulently for soliciting calls to “target” numbers. The method (100) comprises a plurality of iterations of a detection stage (104) comprising the following steps: sending (106) a telephone call to at least one target number; receiving (108) at least one message; detecting (110) at least one soliciting number from said received message; and detecting a new target number in said received message; the method being characterized in that it includes a new iteration of the detection stage (104) using said new target number when said target number is a new number. The invention also provides a system for performing such a method (100).

Abstract: A method for monitoring traffic revenue flows for a plurality of communications companies using Information Technology (IT) systems, including the following steps (v) designing an optimal sample of transactions that maximizes the probability of detecting billing errors done by the communications companies; (vi) executing transactions from the optimal sample of transactions through a plurality of communications networks and recording test transactions data ,using concurrently a shared infrastructure comprising a plurality of robots for generating the transactions; (vii) collecting invoice lines from the IT systems in a non intrusive way, through an automated browsing of the web sites of the communications companies; so as to extract billing data for each test transaction, and (viii) processing the recorded test transactions data so as to re-rate billing for the test transactions, and matching said re-rated transaction billing data to billing data invoice extracted from the collected invoice lines, so as detec