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| Stephen Kho is a penetration tester within the CISO team of the Netherland’s largest telecoms provider KPN. He has been a professional pentester for over 10 years and has experience in security testing across several domains including network infrastructure, VoIP, ICS/SCADA and web application. He presented a technical briefing entitled, “Securing Unified Communications – Vulnerability Analysis and Best Practises” at UC Expo 2009 in London. More recently, he has been active in the areas of 3G & 4G mobile communication security testing and this work led to a presentation titled “4G LTE security – what a hacker knows and doesn’t want you to know?” at the OHM 2013 Security conference which he was a co-author & presenter. Stephen’s current research is focussed on the area of GRX (GPRS Roaming eXchange) networks security.
Rob Kuiters works as an incident response handler in the CISO team at KPN, the largest telecoms provider in the Netherlands. He has been involved in mobile networks from the very early start of GSM in the Netherlands. In 2007 he joined KPN-CERT as a technical mobile security specialist. The main focus of Rob’s work is currently still in mobile networking. His research on the new 4G mobile network contributed to the talk “4G LTE security – what a hacker knows and doesn’t want you to know?” at OHM 2013 Security Conference which he was a co-author & presenter. The main areas of his current research is GRX (GPRS Roaming Exchange) and signalling networks security. Stephen has presented at:
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