3Com Megahertz
Access Point User Guide
Mobile IP Using MD5 Authentication 

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Mobile IP Using MD5 Authentication

You can achieve authentication by using the MD5 algorithm with a shared key configured into the AP and its wireless client. MD5 is a message-digest algorithm that takes an arbitrarily long message and computes a fixed-length (16 bytes) digest version of the original message. You can think of the message-digest as a unique fingerprint of the original message computed using a mathematical formula or algorithm. The message-digest is the authentication checksum of a message from a mobile wireless client to an AP during the Home Agent registration process. The MD5 algorithm prevents a wireless client from impersonating an authenticated wireless client.