| Interface | Description | 
|---|---|
| AuthenticationToken | |
| DelegationToken | An  AuthenticationTokenthat wraps a "Hadoop style" delegation token created by Accumulo. | 
| Class | Description | 
|---|---|
| AuthenticationToken.AuthenticationTokenSerializer | A utility class to serialize/deserialize  AuthenticationTokenobjects.Unfortunately, these methods are provided in an inner-class, to avoid breaking the interface API. | 
| AuthenticationToken.Properties | |
| AuthenticationToken.TokenProperty | |
| CredentialProviderToken | An  AuthenticationTokenbacked by a Hadoop CredentialProvider. | 
| KerberosToken | Authentication token for Kerberos authenticated clients | 
| NullToken | |
| PasswordToken | 
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