L37-IPSec - IPSec – IP Security End-to-End protection...

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IPSec IPSec IP Security IP Security
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End End -to to -End protection End protection • SSL/TLS does this above the network layer. • IPSec does this for any IP packet, at network layer. server host server
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IPSec IPSec • IPSec = IP (Internet Protocol) Security – Suite of security services that provide encryption, integrity and authentication services for IP packets. – Mandatory-to-implement for IPv6, optional for IPv4. • Consists of two main components: – IPSec protection protocols – IPSec key establishment
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An Unprotected IP Packet An Unprotected IP Packet IP Header Fields Source IP address Destination IP address Upper-layer Fields IP Header IP Packet
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IPSec IPSec Architecture Architecture Data Data SPI SPI IP IP Hdr Hdr Security Parameters Index
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IPSec IPSec Protection Protocols Protection Protocols • Authentication Header (AH) –Au then t ica te s pay
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L37-IPSec - IPSec – IP Security End-to-End protection...

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