| Package | Description | 
|---|---|
| org.apache.hadoop.security.authentication.server | Provides the server-side framework for authentication. | 
| org.apache.hadoop.security.authentication.util | 
| Class and Description | 
|---|
| AuthToken | 
| SignerSecretProvider The SignerSecretProvider is an abstract way to provide a secret to be used
 by the Signer so that we can have different implementations that potentially
 do more complicated things in the backend. | 
| Class and Description | 
|---|
| AuthToken | 
| RolloverSignerSecretProvider An abstract SignerSecretProvider that can be use used as the base for a
 rolling secret. | 
| SignerException Exception thrown by  Signerwhen a string signature is invalid. | 
| SignerSecretProvider The SignerSecretProvider is an abstract way to provide a secret to be used
 by the Signer so that we can have different implementations that potentially
 do more complicated things in the backend. | 
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