Overview
Built on a framework defined by the Internet Security Association and Key Management Protocol (ISAKMP), Internet Key Exchange (IKE) provides automatic key negotiation and SA establishment services for IPsec, simplifying the application, management, configuration and maintenance of IPsec dramatically.
Instead of transmitting keys directly across a network, IKE peers transmit keying materials between them, and calculate shared keys respectively. Even if a third party captures all exchanged data for calculating the keys, it cannot calculate the keys.