taub-IPsec - IP Security Lawrence Taub taub@ufl.edu IPSEC...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
IP Security Lawrence Taub taub@ufl.edu
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
IPSEC IP security — security built into the IP layer Provides host-to-host (or router-to-router) encryption and authentication Required for IPv6, optional for IPv4 Comprised of two parts: IPSEC proper (authentication and encryption) IPSEC key management
Background image of page 2
IPSEC Authentication header (AH) — integrity protection of header only Inserted into IP datagram Integrity check value (ICV) is 96-bit HMAC
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
IPSEC Proper The AH authenticates entire datagram Mutable fields (time-to-live, IP checksums) are zeroed before AH is added Sequence numbers provide replay protection Receiver tracks packets within a 64-entry sliding window
Background image of page 4
IPSEC Proper Encapsulating security protocol (ESP) — authentication (optional) and confidentiality Inserted into IP datagram Contains sequence numbers and optional ICV as for AH
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
IPSEC Proper ESP secures data payload in datagram Encryption protects payload Authentication protects header and encryption Security Association bundling is possible ESP without authentication inside AH Authentication covers more fields this way than just ESP with authentication
Background image of page 6
Key management establishes a security association (SA) for a session SA used to provide authentication/confidentiality for that session SA is referenced via a security parameter index (SPI) in each IP datagram header
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/17/2012 for the course CIS 6930 taught by Professor Staff during the Fall '08 term at University of Florida.

Page1 / 19

taub-IPsec - IP Security Lawrence Taub taub@ufl.edu IPSEC...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online