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1.3.3 Client Initiated SPNG Message Flow

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SPNG message flow is composed of the following exchange:

SPNG exchange

Figure 1: SPNG exchange

  1. The client sends a negTokenInit message to the server. This message specifies the available authentication methods and an optimistic mechanism token ([RFC4178] section 3.1).

  2. The server sends a negTokenResp message to the client. The message specifies the state of the negotiation.