net.siefkes.nlstego.textgen
Class StegoEncoder

java.lang.Object
  net.siefkes.nlstego.textgen.StegoCoder
      net.siefkes.nlstego.textgen.StegoEncoder

public class StegoEncoder
extends StegoCoder

A stego encoder hides bit sequences into inconspicuous stego texts. Instances of this class are immutable and thus thread-safe.

Instances of this class are not stateless and must be synchronized externally, if required.

Version:

$Revision: 1.20 $, $Date: 2005/07/28 15:03:12 $, $Author: siefkes $

Author:

Christian Siefkes

Constructor Summary

StegoEncoder(Configuration conf, TextModel model)
Creates a new instance.

Method Summary

String	encode(byte[] bytes) Reads a bit sequence and encodes it into an inconspicuous stego text.
String	encode(InputStream in) Reads a bit sequence and encodes it into an inconspicuous stego text.

Methods inherited from class net.siefkes.nlstego.textgen.StegoCoder

debugBits, debugSingleton, filterFirst, getTextModel, resetState, toString, updateState

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

StegoEncoder

public StegoEncoder(Configuration conf,
                    TextModel model)

Creates a new instance.

Parameters:

conf - the configuration to use

model - the text model to use

Method Detail

encode

public String encode(InputStream in)
              throws IOException

Reads a bit sequence and encodes it into an inconspicuous stego text.

Parameters:

in - stream containing the bit sequence to encode; not closed by this method

Returns:

the generated stego text

Throws:

IOException - if an I/O error occurs

encode

public String encode(byte[] bytes)

Reads a bit sequence and encodes it into an inconspicuous stego text.

Parameters:

bytes - the bit sequence to encode

Returns:

the generated stego text