The protocol IPSec uses to negotiate a security association (SA) between two computers. IKE also assigns a shared secret key to be used for the length of the SA.
A relationship between two computers for the purposes of secure communication. An SA is created using the IKE protocol; the SA an IPSec connection will use is determined by negotiation between the connecting computers.
Allows the sender of a packet to be authenticated, but does not encrypt the contents of the packet. AH is more efficient, but less secure, than ESP.
Allows for both the authentication of the sender and the encryption of the contents of the packet. ESP is more secure, but less efficient, when compared to AH.
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