IPsec and Security Associations
A security association (SA) is the combination of security services, protection mechanisms, and cryptographic keys mutually agreed to by communicating peers. The SA contains the information needed to determine how the traffic is to be secured (the security services and protection mechanisms) and with which secret keys (cryptographic keys). There are two types of SAs that are created when IPsec peers communicate securely: the Internet Security Association and Key Management Protocol (ISAKMP) SA and the IPsec SA.
ISAKMP SA
The ISAKMP SA, also known as the main mode SA, is used to protect IPsec security negotiations. The ISAKMP SA is created by negotiating the ciphersuite used for protecting future ISAKMP traffic, exchanging ...
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