III. SECURITY THREATS
A. User Identity
User-identity transference in clear-text during the initial
attach procedure compromises the entire system, creating a
security gap which exploitation allows an eavesdropper to
track the user cell-location or perform an man-in-the-middle
attack between the UE and the eNB by means of user IMSI
impersonation and relay of user messages.
B. Femtocells
Femtocells becomes a great risk, as they are the only corenetwork
devices out of the operator control. These devices
are located inside the user home installations, connected to a
local e-NodeB to provide wide coverage extension, but being
physically accessible by the customer.
Tampering the device to avoid software updates, or modifying
their usual behaviour may create an important breach
inside the core network [7]. Once the device software is modified
without the operator consciousness, UE may be driven to
use clear-text communications during the AKA process, faking
the security capabilities to force a null encryption.
III. SECURITY THREATS
A. User Identity
User-identity transference in clear-text during the initial
attach procedure compromises the entire system, creating a
security gap which exploitation allows an eavesdropper to
track the user cell-location or perform an man-in-the-middle
attack between the UE and the eNB by means of user IMSI
impersonation and relay of user messages.
B. Femtocells
Femtocells becomes a great risk, as they are the only corenetwork
devices out of the operator control. These devices
are located inside the user home installations, connected to a
local e-NodeB to provide wide coverage extension, but being
physically accessible by the customer.
Tampering the device to avoid software updates, or modifying
their usual behaviour may create an important breach
inside the core network [7]. Once the device software is modified
without the operator consciousness, UE may be driven to
use clear-text communications during the AKA process, faking
the security capabilities to force a null encryption.
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