IKE and AuthIP Ipsec Keying Modules
Windows Vista Service Details
If you need IKE. Leave it alone, but not really needed. Used for some VPN software.
Modules used for authentication and key exchange in Internet Protocol security (IPsec). Stopping or disabling the service will disable IKE and AuthIP key exchange with peer computers.
Consequences of Stopping:
All services listed in 'Required For' will be unable to function