| Package | Description | 
|---|---|
| org.apache.hadoop.crypto.key | Licensed to the Apache Software Foundation (ASF) under one
 or more contributor license agreements. | 
| org.apache.hadoop.crypto.key.kms | |
| org.apache.hadoop.fs | An abstract file system API. | 
| org.apache.hadoop.fs.viewfs | |
| org.apache.hadoop.ha | |
| org.apache.hadoop.ha.protocolPB | |
| org.apache.hadoop.ipc | Tools to help define network clients and servers. | 
| org.apache.hadoop.security | |
| org.apache.hadoop.security.authorize | |
| org.apache.hadoop.security.token | |
| org.apache.hadoop.security.token.delegation | |
| org.apache.hadoop.util | Common utilities. | 
| Class and Description | 
|---|
| Credentials A class that provides the facilities of reading and writing
 secret keys and Tokens. | 
| Class and Description | 
|---|
| Credentials A class that provides the facilities of reading and writing
 secret keys and Tokens. | 
| Class and Description | 
|---|
| AccessControlException An exception class for access control related issues. | 
| Credentials A class that provides the facilities of reading and writing
 secret keys and Tokens. | 
| UserGroupInformation User and group information for Hadoop. | 
| Class and Description | 
|---|
| AccessControlException An exception class for access control related issues. | 
| Class and Description | 
|---|
| AccessControlException An exception class for access control related issues. | 
| Class and Description | 
|---|
| AccessControlException An exception class for access control related issues. | 
| Class and Description | 
|---|
| UserGroupInformation User and group information for Hadoop. | 
| Class and Description | 
|---|
| Credentials A class that provides the facilities of reading and writing
 secret keys and Tokens. | 
| GroupMappingServiceProvider An interface for the implementation of a user-to-groups mapping service
 used by  Groups. | 
| IdMappingServiceProvider An interface for the implementation of  | 
| SaslPropertiesResolver Provides SaslProperties to be used for a connection. | 
| SaslRpcServer.AuthMethod Authentication method | 
| SaslRpcServer.QualityOfProtection | 
| UserGroupInformation User and group information for Hadoop. | 
| UserGroupInformation.AuthenticationMethod existing types of authentications' methods | 
| Class and Description | 
|---|
| AccessControlException An exception class for access control related issues. | 
| UserGroupInformation User and group information for Hadoop. | 
| Class and Description | 
|---|
| UserGroupInformation User and group information for Hadoop. | 
| Class and Description | 
|---|
| UserGroupInformation User and group information for Hadoop. | 
| Class and Description | 
|---|
| SaslRpcServer.AuthMethod Authentication method | 
| UserGroupInformation User and group information for Hadoop. | 
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