Belkin High Performance Wireless VPN Router N300 - Manual (Page 93)

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VPN
SA (Security Association)
A Security Association (SA) is the establishment of shared
security attributes between two network entities to support
secure communication. An SA may include attributes such as:
cryptographic algorithms and mode; traffic encryption keys;
and parameters for the network data to be passed over the
connection. Establishment of an SA is described in RFC 2408, the
Internet Security Association and Key Management Protocol.
This page allows you to configure SA.