| Package | Description | 
|---|---|
| javax.crypto | Provides the classes and interfaces for cryptographic operations. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | NullCipherThe NullCipher class is a class that provides an
 "identity cipher" -- one that does not transform the plain text. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Cipher | Cipher. getInstance(String transformation)Returns a  Cipherobject that implements the specified
 transformation. | 
| static Cipher | Cipher. getInstance(String transformation,
           Provider provider)Returns a  Cipherobject that implements the specified
 transformation. | 
| static Cipher | Cipher. getInstance(String transformation,
           String provider)Returns a  Cipherobject that implements the specified
 transformation. | 
| Modifier and Type | Method and Description | 
|---|---|
| PKCS8EncodedKeySpec | EncryptedPrivateKeyInfo. getKeySpec(Cipher cipher)Extract the enclosed PKCS8EncodedKeySpec object from the
 encrypted data and return it. | 
| Object | SealedObject. getObject(Cipher c)Retrieves the original (encapsulated) object. | 
| Constructor and Description | 
|---|
| CipherInputStream(InputStream is,
                 Cipher c)Constructs a CipherInputStream from an InputStream and a
 Cipher. | 
| CipherOutputStream(OutputStream os,
                  Cipher c)Constructs a CipherOutputStream from an OutputStream and a
 Cipher. | 
| SealedObject(Serializable object,
            Cipher c)Constructs a SealedObject from any Serializable object. | 
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