IPv6, 2nd Edition

102 Part Two • IPv6 Protocols

an attacker pretends to be Bob to one system’s Alice, while pretending

to be Alice to the other system’s Bob).

SKIP Sun Microsystems’ Simple Key-management for Internet Protocols

(SKIP) is also based on Diffie-Hellman key exchange, but rather than

requiring parties to use random values to calculate their keys, SKIP

calls for the use of a secret table that remains static. The parties look up

secret values in this table and then transmit calculated values based

on some secret value from the table.

OAKLEY Although this mechanism shares some features with Photuris,

it provides different modes of key exchange for situations where

denial-of-service attacks are not a concern.

By defining a separate protocol, ISAKMP, for the generalized ...