Cisco Cisco Packet Data Gateway (PDG)

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Supported Algorithms
Table 3: Supported Algorithms
Supported Options
Type
Protocol
DES-CBC, 3DES-CBC, AES-CBC-128, AES-CBC-256,
AES-128-GCM-128, AES-128-GCM-64,
AES-128-GCM-96, AES-256-GCM-128,
AES-256-GCM-64, AES-256-GCM-96
AES-GCM algorithms are supported only on
VPC-DI and VPC-SI Platform.
Note
IKEv2 Encryption
Internet Key Exchange
version 2
PRF-HMAC-SHA1, SHA2-256, SHA2-384, SHA2-512,
PRF-HMAC-MD5, AES-XCBC-PRF-128
IKEv2 Pseudo Random
Function
HMAC-SHA1-96, HMAC-SHA2-256-128,
HMAC-SHA2-384-192. HMAC-SHA2-512-256,
HMAC-MD5-96, AES-XCBC-96
IKEv2 Integrity
Group 1 (768-bit), Group 2 (1024-bit), Group 5 (1536-bit),
Group 14 (2048-bit)
IKEv2 Diffie-Hellman
Group
NULL, DES-CBC, 3DES-CBC, AES-CBC-128,
AES-CBC-256
IPSec Encapsulating
Security Payload
Encryption
IP Security
Value of 0 or off is supported (ESN itself is not supported)
Extended Sequence
Number
NULL, HMAC-SHA1-96, HMAC-MD5-96,
AES-XCBC-96, HMAC-SHA2-256-128,
HMAC-SHA2-384-192, HMAC-SHA2-512-256
HMAC-SHA2-384-192 and
HMAC-SHA2-512-256 are not supported
on vPC-DI and vPC-SI platforms if the
hardware doesn't have crypto hardware.
Important
IPSec Integrity
x.509 Digital Certificate Handling
A digital certificate is an electronic credit card that establishes a subscriber's credentials when doing business
or other transactions on the Internet. The digital certificates used by the ePDG conform to ITU-T standard
X.509 for a PKI (Public Key Infrastructure) and PMI (Privilege Management Infrastructure). X.509 specifies
standard formats for public key certificates, certificate revocation lists, attribute certificates, and a certification
path validation algorithm.
The ePDG is capable of authenticating itself to the UE using certificates and does so in the response to the
first IKE_AUTH Request message from the UE.
ePDG Administration Guide, StarOS Release 19    
9
Evolved Packet Data Gateway Overview
IKEv2 and IPSec Encryption