Explain ESP in detail
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Definition - What does Encapsulating Security Payload (ESP) mean?
An Encapsulating Security Payload (ESP) is a protocol within the IPSec for providing authentication, integrity and confidentially of network packets data/payload in IPv4 and IPv6 networks. ESP provides message/payload encryption and the authentication of a payload and its origin within the IPSec protocol suite.
Techopedia explains Encapsulating Security Payload (ESP)
An Encapsulating Security Payload is primarily designed to provide encryption, authentication and protection services for the data or payload that is being transferred in an IP network. ESP doesn’t protect the packet header; however, in a tunnel mode if the entire packet is encapsulated within another packet as a payload/data packet, it can encrypt the entire packet residing inside another packet. Typically, in an IP network packet, the ESP header is placed after the IP header. The components of an ESP header include sequence number, payload data, padding, next header, an integrity check and sequenced numbers.
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There may be no topic in psychology quite as controversial, or as fascinating, as extrasensory perception, or ESP. Three posited forms of ESP are: 1. Telepathy - transfer of information from one person to another without known mediation of sensory communication, 2. Clairvoyance - acquisition of information about places, people, or events without mediation of known senses, and 3. Precognition - acquisition of information about a future event that could not be anticipated through any known processes of inference. In a study of telepathy, or psi, for example, participants are seated in two separate rooms; while one “transmits” signals, the other attempts to “receive” them. However, critics argue that many of the effects demonstrated in ESP experiments can simply be explained by faulty methodology and sensory “leakage” in which participants inadvertently give away the answers. The only "extra-sensory" feature in such cases might be that some people are very good at reading people’s very subtle signals.
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