Danny Lieberman is a security expert with a broader range than telco revenue assurance, but is invariably worth a read for his insights on how organizations work and the importance of protecting data. I recommend you take a look at this recent post about fraud and security.
About the Author
Eric is a recognized expert on communications risk and assurance. He was Director of Risk Management for Qatar Telecom and has worked with Cable & Wireless, T‑Mobile, Sky, Worldcom and others. Eric was lead author of Revenue Assurance: Expert Opinions for Communications Providers, published by CRC Press. He was a founding member of Qatar's National Committee for Internet Safety and the first leader of the TM Forum's Enterprise Risk Management team. Eric currently sits on the committee of the Risk & Assurance Group, and is an editorial advisor to Black Swan. He is a qualified chartered accountant, with degrees in information systems, and in mathematics and philosophy. Commsrisk is edited by Eric. Look here for more about Eric's history as editor.