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What is ESP (Encapsulating Security Payload)? Encapsulating Security Payload is a protocol for the inter security architecture. It is the key protocol, which is targeted to provide a mixed service of security in IPv4 and IPv6. The ESP seeks for providing confidentiality and integrity by implementing protecting data using encryption and places this data in the portion that is assigned for data of IP ESP. The same mechanism can be used based on the requirements of security of the user. The process can be utilized for encrypting either a transport-layer segment or an entire IP datagram. The protected data encapsulation is used for providing necessary confidentiality for the entire original datagram.
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