| Value | Meaning |
|---|---|
| Invalid-1 | Invalid type |
| PskInit0 | Initiator's pre-shared key message |
| PskVerify1 | Verification message of a Pre-shared key message |
| PkInit2 | Initiator's public-key transport message |
| PkVerify3 | Verification message of a public-key message |
| DhInit4 | Initiator's DH exchange message |
| DhResp5 | Responder's DH exchange message |
| Error6 | Error message |
Different MIKEY data types.