关键词： Fraud detection   Telecommunications   User profiling   Supervised learning   Unsupervised learning  

摘要： This paper investigates the usefulness of applying different learning approaches to a problem of telecommunications fraud detection. Five different user models are compared by means of both supervised and unsupervised learning techniques, namely the multilayer perceptron and the hierarchical agglomerative clustering. One aim of the study is to identify the user model that best identifies fraud cases. The second task is to explore different views of the same problem and see what can be learned form the application of each different technique. All data come from real defrauded user accounts in a telecommunications network. The models are compared in terms of their performances. Each technique's outcome is evaluated with appropriate measures. (c) 2008 Elsevier B.V. All rights reserved.

关键词： manager   forgery   Fraud   Project management   vandalism   Telephone   Nothing  

摘要： Craig Pollard, head of project management at Siemens Communications examines the increasing threat of telephony fraud and highlights the vulnerabilities to IT managers. (C) 2005 Elsevier Ltd. All rights reserved.

关键词： Security of data  

摘要： The importance of IT network security in combating telephony fraud is discussed. The PBX is among the most susceptible areas to telecommunications fraud. When a PBX is linked to an organization's IT network, a poorly protected maintenance port can offer hackers an open and undefended back door into such critical assets as customer databases and business applications. The consequences of inaction includes: loss of service, adverse publicity, missed cost saving opportunities, and litigation and consequential financial loss.

摘要： The question "What's new in telecommunications fraud?" might be regarded as provocative. A simple answer would be that nothing much has changed over the past year. The major problems that face telcos and their customers are still dial through fraud, subscription fraud, illicit access and theft.

摘要： Telecommunications fraud is often considered to be victimless. Most telcos, particularly ex-government monopolies, are usually cash rich and the common conception is that they can afford to take a hit. Is this true? Closer inspection tells us not. Fraud can cause distress, loss of service and loss of customer confidence. Moreover, if a telco takes a substantial fraud hit then it is almost inevitably passed on to the customer in the long run. Telecommunications crime is not some latter day Robin Hood activity committed by loveable rogues. Rather, it is a serious business which causes real harm. Some estimates of global telecommunications fraud losses run to some $30 billion per annum.