| Package | Description | 
|---|---|
| java.security | 
 Provides the classes and interfaces for the security framework. 
 | 
| javax.crypto | 
 Provides the classes and interfaces for cryptographic operations. 
 | 
| javax.crypto.interfaces | 
 Provides interfaces for Diffie-Hellman keys as defined in
RSA Laboratories' PKCS #3. 
 | 
| javax.crypto.spec | 
 Provides classes and interfaces for key specifications and algorithm
parameter specifications. 
 | 
| javax.security.auth.kerberos | 
 This package contains utility classes related to the Kerberos network
 authentication protocol. 
 | 
| Class and Description | 
|---|
| SecretKey
 A secret (symmetric) key. 
 | 
| Class and Description | 
|---|
| BadPaddingException
 This exception is thrown when a particular padding mechanism is
 expected for the input data but the data is not padded properly. 
 | 
| Cipher
 This class provides the functionality of a cryptographic cipher for
 encryption and decryption. 
 | 
| CipherSpi
 This class defines the Service Provider Interface (SPI)
 for the  
Cipher class. | 
| ExemptionMechanism
 This class provides the functionality of an exemption mechanism, examples
 of which are key recovery, key weakening, and
 key escrow. 
 | 
| ExemptionMechanismException
 This is the generic ExemptionMechanism exception. 
 | 
| ExemptionMechanismSpi
 This class defines the Service Provider Interface (SPI)
 for the  
ExemptionMechanism class. | 
| IllegalBlockSizeException
 This exception is thrown when the length of data provided to a block
 cipher is incorrect, i.e., does not match the block size of the cipher. 
 | 
| KeyAgreement
 This class provides the functionality of a key agreement (or key
 exchange) protocol. 
 | 
| KeyAgreementSpi
 This class defines the Service Provider Interface (SPI)
 for the  
KeyAgreement class. | 
| KeyGenerator
 This class provides the functionality of a secret (symmetric) key generator. 
 | 
| KeyGeneratorSpi
 This class defines the Service Provider Interface (SPI)
 for the  
KeyGenerator class. | 
| Mac
 This class provides the functionality of a "Message Authentication Code"
 (MAC) algorithm. 
 | 
| MacSpi
 This class defines the Service Provider Interface (SPI)
 for the  
Mac class. | 
| NoSuchPaddingException
 This exception is thrown when a particular padding mechanism is
 requested but is not available in the environment. 
 | 
| SealedObject
 This class enables a programmer to create an object and protect its
 confidentiality with a cryptographic algorithm. 
 | 
| SecretKey
 A secret (symmetric) key. 
 | 
| SecretKeyFactory
 This class represents a factory for secret keys. 
 | 
| SecretKeyFactorySpi
 This class defines the Service Provider Interface (SPI)
 for the  
SecretKeyFactory class. | 
| ShortBufferException
 This exception is thrown when an output buffer provided by the user
 is too short to hold the operation result. 
 | 
| Class and Description | 
|---|
| SecretKey
 A secret (symmetric) key. 
 | 
| Class and Description | 
|---|
| SecretKey
 A secret (symmetric) key. 
 | 
| Class and Description | 
|---|
| SecretKey
 A secret (symmetric) key. 
 | 
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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