LTE REDIRECTION

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Countermeasures (1/2) • Cellphone manufacture – smart response • Scheme 1: Don‟t follow the redirection command, but auto-search other available base station. • Scheme 2: Follow the redirection command, but raise an alert to cellphone user: Warning! You are downgraded to low security network.
Countermeasures (2/2) • Standardization effort • Fix the weak security of legacy network: GSM • 3GPP TSG SA WG3 (Security) Meeting #83, S3-160702, 9-13 May 2016 Legacy Security Issues and Mitigation Proposals, Liaison Statement from GSMA. • Refuse one-way authentication • Disabling compromised encryption in mobile
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 and 24: 3GPP‟s Decision • “Reply LS o
Page 25: Network Availability vs.. Privacy
Page 29: Thank you!

LTE REDIRECTION

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