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What is ESP?

abrahim Diamond Medal

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7 years 10 months ago View: 1755 Reply: 4

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Encapsulating Security Payload (ESP), a key protocol in the Internet Protocol Security (IPsec) architecture. ESP is used in transport mode or tunnel mode and provides origin authenticity, anti-replay, and integrity and confidentiality protection of packets. ESP provides data confidentiality and integrity by encrypting the data to be protected and placing the encrypted data in the data of the ESP. Based on security requirements of subscribers, ESP can be used to encrypt either a transport-layer segment or an IP data packet. A transport-layer segment can be a TCP, UDP, Internet Control Message Protocol (ICMP), or Internet Group Management Protocol (IGMP) segment.