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This paper proposes a novel secure binding management protocol for mobile IPv6 networks for use in the implementation of routing optimization. The idea uses the public key of the home network of a mobile node to cryptographically generate the mobile node's home address and the associated private key to sign the mobile node's authentication requests. In addition, the proposed protocol performs reachability tests for both the home address and the care-of address. The proposed protocol offloads all expensive cryptographic operations from a mobile node to its home agent. The security of the protocol is informally analysed and an initially evaluation of its performance given.