Cisco Cisco Packet Data Gateway (PDG) Fehlerbehebungsanleitung
GPRS Service Configuration Mode Commands
ciphering-algorithm ▀
Cisco ASR 5000 Series Command Line Interface Reference ▄
OL-22948-01
ciphering-algorithm
This command configures the priority, ordering, for the use of the GPRS encryption ciphering algorithms.
Product
SGSN
Privilege
Security Administrator, Administrator
Syntax
Returns the system ciphering-algorithm priority to the default of GEA0 - which means that no ciphering will
be done.
be done.
Defines the priority or order of use for the ciphering algorithm.
must be an integer from 1 to 8.
Identifies the algorithm to be matched to the priority. Options include:
gea0 - No ciphering
gea1 - GPRS Encryption Algorithm - GEA1
gea2 - GPRS Encryption Algorithm - GEA2
gea3 - GPRS Encryption Algorithm - GEA3
gea4 - GPRS Encryption Algorithm - GEA4 (not yet supported)
gea5 - GPRS Encryption Algorithm - GEA5 (not yet supported)
gea6 - GPRS Encryption Algorithm - GEA6 (not yet supported)
gea7 - GPRS Encryption Algorithm - GEA7 (not yet supported)
Usage
Use this command to specify the order (priority) of usage for the GPRS encryption algorithms. All of the
GPRS encapsulation algorithms use a 64-bit key derived from a common mechanism: the mobile receives a
random challenge, then the SIM calculates an authentication signature and an encryption key.
GPRS encapsulation algorithms use a 64-bit key derived from a common mechanism: the mobile receives a
random challenge, then the SIM calculates an authentication signature and an encryption key.
Example
The following command sets no ciphering to be used after two encryption algorithms have been used:
The following command sets no ciphering to be used after two encryption algorithms have been used: