LTE REDIRECTION

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Why 3GPP Made Such Decision • In special cases, e.g. earthquake, hot events • Too many people try to access one base station then make this base station overloaded. • To let network load balanced, this base station can ask the new coming cellphone to redirect to another base station. • If you don‟t tell cellphones which base station is light-loaded, the cellphones will blindly and inefficiently search one by one, and then increase the whole network load. Overloaded Base station Light-loaded Base station Overloaded Base station Overloaded Base station
Network Availability vs.. Privacy • Global roaming • IMSI Catcher • Battery energy saving VS. e.g. Wifi MAC addr tracking • DoS Attack • Load balance • Redirection Attack Basic requirement High level requirement
Page 1 and 2: LTE REDIRECTION Forcing Targeted LT
Page 3 and 4: IMSI Catcher Once a cellphone goes
Page 5 and 6: Redirection Attack Malicious LTE:
Page 7 and 8: Demo Video
Page 9 and 10: LTE Basic Procedure • (Power on)
Page 11 and 12: Procedure of DoS Attack Attach Reje
Page 13 and 14: How to Build Fake LTE Network • C
Page 15 and 16: OpenLTE Source Code (1/3) In curren
Page 17 and 18: OpenLTE Souce Code (2/3) DoS attack
Page 19 and 20: OpenLTE Source Code (3/3) redirectC
Page 21 and 22: Think from the other side Attacker
Page 23: 3GPP‟s Decision • “Reply LS o
Page 27 and 28: Countermeasures (2/2) • Standardi
Page 29: Thank you!

LTE REDIRECTION

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