# enum DaiAuthenticationKeyType (v202505)

**Service** **DaiAuthenticationKeyService** **Dependencies** [DaiAuthenticationKey](https://developers.google.com/ad-manager/api/reference/v202505/DaiAuthenticationKeyService.DaiAuthenticationKey) ▼ **DaiAuthenticationKeyType**

Key types associated with [DaiAuthenticationKey](https://developers.google.com/ad-manager/api/reference/v202505/DaiAuthenticationKeyService.DaiAuthenticationKey) objects.

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Namespace
:
    `https://www.google.com/apis/ads/publisher/v202505`

| Enumeration | Description |
|---|---|
| `UNKNOWN` | The value returned if the actual value is not exposed by the requested API version. |
| `API` | Indicates that the key is a standard API key and should be used with the api-key SDK parameter when authenticating stream create requests. |
| `HMAC` | Indicates that the key is an HMAC key and should be used to generate a signature for the stream create request with the auth-token SDK parameter. |