This class is an output stream that uses a Cipher object to encrypt or decrypt bytes before passing them to another output stream. You must initialize the Cipher object before passing it to the CipherOutputStream( ) constructor. If you are using a Cipher with any kind of padding, you must not call flush( ) until you are done writing all data to the stream; otherwise decryption fails.

Figure 17-3. javax.crypto.CipherOutputStream

public class CipherOutputStream extends java.io.FilterOutputStream {
// Public Constructors
     public CipherOutputStream(java.io.OutputStream os, Cipher c);  
// Protected Constructors
     protected CipherOutputStream(java.io.OutputStream os);  
// Public Methods Overriding FilterOutputStream
     public void close( ) throws java.io.IOException;  
     public void flush( ) throws java.io.IOException;  
     public void write(int b) throws java.io.IOException;  
     public void write(byte[ ] b) throws java.io.IOException;  
     public void write(byte[ ] b, int off, int len) throws java.io.IOException;  
}