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Configuring the AP

AP-4131 Access Point Product Reference Guide 155

2.17 Mobile IP Using MD5 Authentication

Users can achieve authentication by using the MD5 algorithm with a shared

key configured into the AP and its MU. MD5 is a message-digest algorithm

that takes an arbitrarily long message and computes a fixed-length digest

version, consisting of 16 bytes (128 bits), of the original message. Users can

think of the message-digest as a fingerprint of the original message. Since

the message-digest is computed using a mathematical formula or algorithm,

the probability of an entity reproducing the message-digest is equivalent to

two people having the same fingerprints. The message-digest is the

authentication checksum of a message from a mobile MU to an AP during

the Home Agent registration process. The MD5 algorithm purpose,

therefore, prevents an MU from impersonating an authenticated MU.

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Symbol-technologies Spectrum24 AP-4131 Bedienungsanleitung Seite 165