DIAMETER

DIAMETER is the newest framework in IETF for the next-generation AAA server.

Provides an AAA framework for Mobile-IP.

Does not use the same RADIUS protocol data unit, but is backward compatible with RADIUS to ease migration.

Bidirectional authentication.

It uses UDP but has a scheme that regulates the flow of packets.

Challenge/response attributes can be secured using end-to-end encryption and authentication.

Supports end-to-end security.