Reference: [RFC]; Note: These values were reserved as per draft-ipsec-ike- ecc-groups which never made it to the RFC. These values. [RFC ] Negotiation of NAT-Traversal in the IKE. [RFC ] Algorithms for Internet Key Exchange version 1 (IKEv1). RFC RFC IP Security (IPsec) and Internet Key Exchange (IKE) Protocol ( ISAKMP); RFC The Internet Key Exchange (IKE); RFC

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As you may guess from the terminology itself, it is a method that is used for Internet Security. IKE has two dfc as follows: Following sequence is based on RFC 2. Extensible Authentication Protocol Methods. If you are interested in 3GPP based device e. However this doesn’t mean that you don’t have to refer to RFC anymore.

Overall key exchanging protocol sequence in This is from Figure 8. I put the step number of 3GPP procedure on the right end of Wireshark log. These tasks are not performed by each separate steps, they are all performed in a signal back-and-forth. Actually Step 1 is made up of two sub steps as follows: If you have wireshark log, you can easily look into the details of the data structure.


Internet Key Exchange

It is very complicated structure and of course you don’t have to memorize this structure and value. At step 2. UE sends following ID. UE begins negotiation of child security association. Requesting an Ile Address on a Remote Network. Following is one example of Wireshark log for this step. At step 3. AAA Server identity the user. At step 4.

Internet Key Exchange (IKE) Attributes

At Kie 5. AAA Server initiate the authentication challenge. In this case, user identity is not requested. At Step 7. UE checks the authentication parameters and responds to the authentication challenge. At Step 8. At Step 9. At Step 10.

At Step rcf. At Step 12. At Step 13. At Step 14. At Step 15. If you are interested in the full details of the each of the parameters getting involved in IKEv2 process, refer to RFC I will summarize on some of the important parameters later. You can interpret this in two ways as follows. How can a device or a server can do DPD?

The method is very simple. If it recieves the response, it consider that the other party is alive. If not, it considers the other party is dead.

Internet Key Exchange – Wikipedia

If it does not get any response for a certain duration, it usually delete the existing SA. Refer to RFC for details. Key Exchange Data variable length – Data required to generate a session key. This field may also contain pre-placed key indicators. Nonce Data variable length – Contains the random data generated ije the transmitting entity. If unused, then this field MUST be set to 0. Identification Data variable length – Contains identity information.


At step 2UE sends following ID. At step 3ePDG take out the information from the information e. At Step 7UE checks the authentication parameters and responds to the authentication challenge.

An initiator MAY provide multiple proposals for negotiation; a responder MUST reply with only one KE is the key exchange payload which contains the public information exchanged in a Diffie-Hellman exchange.

There is no particular encoding e. Nx is the nonce payload; x can be: IDx is the identification payload for “x”. SIG is the signature payload. The data to sign is exchange- specific.

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