Encapsulating Security Payload is a transport layer security protocol. In IPv4 and IPv6, the ESP header is intended to give a scope of safety administrations. It is intended to work with both the IPv4 and IPv6 protocols. ESP might be utilized for authentication of information origins, connectionless integrity, some level of traffic-level privacy, and an anti-replay service. The ESP protocol may be applied in isolation, in blend with an Authentication Header (AH), or in a nested manner.