The IPsec suite is an open standard . IPsec uses the following protocols to perform various functions: Authentication Headers (AH) provide connectionless integrity and data origin authentication for IP datagrams and provides protection against replay attacks . Encapsulating Security Payloads (ESP) provide confidentiality , data-origin authentication , connectionless integrity , an anti-replay service (a form of partial sequence integrity), and limited traffic-flow confidentiality. Security Associations (SA) provide the bundle of algorithms and data that provide the parameters necessary to AH and/or ESP operations. The Internet Security Association and Key Management Protocol (ISAKMP) provides a framework for authentication and key exchange, with actual authenticated keying material provided either by manual configuration with pre-shared keys, Internet Key Exch...
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