4.2.79 EF_GBABP (GBA Bootstrapping parameters)

31.1023GPPCharacteristics of the Universal Subscriber Identity Module (USIM) applicationRelease 17TS

If service n°68 is "available", this file shall be present.

This EF contains the AKA Random challenge (RAND) and Bootstrapping Transaction Identifier (B-TID) associated with a GBA bootstrapping procedure.

Identifier: ‘6FD6’		Structure: transparent			Optional
File length: L+X+N+3 bytes			Update activity: low
Access Conditions: READ PIN UPDATE PIN DEACTIVATE ADM ACTIVATE ADM
Bytes	Description			M/O		Length
1	Length of RAND (X)			M		1 byte
2 to (X +1)	RAND			M		X bytes
X+2	Length of B-TID (L)			M		1 byte
(X+3) to (X+2+L)	B-TID			M		L bytes
X+L+3	Length of key lifetime			M		1 byte
(X+L+4) to (X+L+N+3)	Key lifetime			M		N bytes

Length of RAND

Contents: number of bytes, not including this length byte, of RAND field

RAND

Contents: Random challenge used in the GBA_U bootstrapping procedure.

Coding: as defined in TS 33.103 [13]

Length of B-TID

Contents: number of bytes, not including this length byte, of B-TID field

B-TID

Content: Bootstrapping Transaction Identifier the GBA_U bootstrapped keys

Coding: As defined in TS 33.220 [42]

Length of key lifetime

Contents: number of bytes, not including this length byte, of key lifetime field

Key lifetime

Content: Lifetime of the GBA_U bootstrapped keys

Coding: As defined in TS 33.220 [42]