Key exchange for a network architecture

1. A method of providing secure communication between an initiator and a responder in a communication network, comprising:

sending a registration request with a plurality of proposals for dynamically establishing a security association between the initiator and the responder; and

receiving a registration response indicating whether none or a multiplicity of the plurality of proposals have been accepted for the security association.

2. The method of claim 1 , further comprising securely communicating in the communication network using a security association corresponding to an accepted one or more proposals out of the plurality of proposals.

3. The method of claim 1 , wherein the registration response further includes one or more other proposals for dynamically establishing another security association between the initiator and the responder.

4. The method of claim 3 , further comprising:

sending another response indicating whether any of the one or more other proposals have been accepted for the another security association; and

securely communicating in the communication network using the another security association corresponding to the accepted one or more other proposals.

5. The method of claim 1 , wherein the plurality of proposals include proposing a number of security transformations to be used to provide the secure communication.

6. The method of claim 1 , wherein the plurality of proposals include proposing a type of security transformation to be used to provide the secure communication.

7. The method of claim 1 , wherein the plurality of proposals include proposing a duration of at least a portion of the security association.

8. The method of claim 1 , wherein the initiator includes a mobile node, and wherein the responder includes one of a home agent, a home mobility manager (HMM), a serving mobility manager (SMM), and a foreign agent.

9. A method of providing secure communication between an initiator and a responder in a communication network, comprising:

receiving a registration request with a plurality of proposals for dynamically establishing a security association between the initiator and the responder; and

sending a registration response indicating whether none or a multiplicity any of the plurality of proposals have been accepted for the security association.

10. The method of claim 9 , further comprising securely communicating in the communication network using a security association corresponding to an accepted one or more proposals out of the plurality of proposals.

11. The method of claim 9 , wherein the registration response further includes one or more other proposals for dynamically establishing another security association between the initiator and the responder.

12. The method of claim 11 , further comprising:

receiving another response indicating whether any of the one or more other proposals have been accepted for the another security association; and

securely communicating in the communication network using the another security association corresponding to the accepted one or more other proposals.

13. The method of claim 9 , wherein the plurality of proposals include proposing a number of security transformations to be used to provide the secure communication.

14. The method of claim 9 , wherein the plurality of proposals include proposing a type of security transformation to be used to provide the secure communication.

15. The method of claim 9 , wherein the plurality of proposals include proposing a duration of at least a portion of the security association.

16. The method of claim 9 , wherein the initiator includes a mobile node, and wherein the responder includes one of a home agent, a home mobility manager (HMM), a serving mobility manager (SMM), and a foreign agent.

17. A system comprising:

at least one of an initiator or

a responder configured to communicate over a communication pathway that couples the at least one of the initiator and the responder;

the initiator and responder being configured to communicate messages over the communication pathway including:

a registration request with a plurality of proposals for dynamically establishing a security association between the initiator and the responder; and

a registration response indicating whether none or a multiplicity of the plurality of proposals have been accepted for the security association;

wherein at least one of the initiator and responder is a hardware device.

18. The system of claim 17 , wherein the messages include communications secured using a security association corresponding to an accepted one or more proposals out of the plurality of proposals.

19. The system of claim 17 , wherein the registration response further includes one or more other proposals for dynamically establishing another security association between the initiator and the responder.

20. The system of claim 19 , wherein the messages further include:

another response indicating whether any of the one or more other proposals have been accepted for the another security association; and

communications secured using the another security association corresponding to the accepted one or more other proposals.

21. The system of claim 17 , wherein the plurality of proposals includes one or a combination of:

a proposal proposing a number of security transformations to be used to provide the secure communication;

a proposal proposing a type of security transformation to be used to provide the secure communication; or

a proposal proposing a duration of at least a portion of the security association.

22. The system of claim 17 , wherein the initiator includes a mobile node.

23. The system of claim 17 , wherein the responder includes one of a home agent, a home mobility manager (HMM), a serving mobility manager (SMM), and a foreign agent.