9.2.29 UE Security Capabilities
36.4233GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17TSX2 Application Protocol (X2AP)
The UE Security Capabilities IE defines the supported algorithms for encryption and integrity protection in the UE. The eNBs store and send the complete bitmaps without modification or truncation as specified in TS 36.300 [15].
|
IE/Group Name |
Presence |
Range |
IE Type and Reference |
Semantics Description |
|
Encryption Algorithms |
M |
BIT STRING (16, …) |
Each position in the bitmap represents an encryption algorithm: "all bits equal to 0" – UE supports no other algorithm than EEA0 "first bit" – 128-EEA1, "second bit" – 128-EEA2, "third bit" – 128-EEA3, “fourth to seventh bit” correspond to bit 4 to bit 1 of octet 3 in the UE Security Capability IE defined in TS 24.301 [14], other bits reserved for future use. Value ‘1’ indicates support and value "0" indicates no support of the algorithm. Algorithms are defined in TS 33.401 [18]. |
|
|
Integrity Protection Algorithms |
M |
BIT STRING (16, …) |
Each position in the bitmap represents an integrity protection algorithm: all bits equal to 0" – UE supports no other algorithm than EIA0 (TS 33.401 [18]) "first bit" – 128-EIA1, "second bit" – 128-EIA2, "third bit" – 128-EIA3, “fourth to seventh bit” correspond to bit 4 to bit 1 of octet 4 in the UE Security Capability IE defined in TS 24.301 [14], other bits reserved for future use. Value ‘1’ indicates support and value "0" indicates no support of the algorithm. Algorithms are defined in TS 33.401 [18]. |