See: Description
| Interface | Description | 
|---|---|
| Destroyable | Objects such as credentials may optionally implement this interface
 to provide the capability to destroy its contents. | 
| Refreshable | Objects such as credentials may optionally implement this
 interface to provide the capability to refresh itself. | 
| Class | Description | 
|---|---|
| AuthPermission | This class is for authentication permissions. | 
| Policy | Deprecated as of JDK version 1.4 -- Replaced by java.security.Policy. | 
| PrivateCredentialPermission | This class is used to protect access to private Credentials
 belonging to a particular  Subject. | 
| Subject |  A  Subjectrepresents a grouping of related information
 for a single entity, such as a person. | 
| SubjectDomainCombiner | A  SubjectDomainCombinerupdates ProtectionDomains
 with Principals from theSubjectassociated with thisSubjectDomainCombiner. | 
| Exception | Description | 
|---|---|
| DestroyFailedException | Signals that a  destroyoperation failed. | 
| RefreshFailedException | Signals that a  refreshoperation failed. | 
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