Data Security for 4G Interconnection and 5G Interconnection Risk Areas

Signalling System No 7 (SS7) based interconnection attacks are well understood and known. With the ongoing deployment of the LTE, the Diameter protocol gained importance also over the interconnection link between mobile networks. Attackers go with technology and therefore we now explore the attack space for Diameter. In this talk, we will go into the known Diameter based attacks and then present the technical details for a data interception attacks using different reference points Sh and S6a under specific configurations. Generic and attack specific countermeasures will be discussed and the talk will close with an outline towards potential security risks introduced by the new 5G Service Based Architecture.