hcrypto.analyzer.tool
Class Dictionary

java.lang.Object
  hcrypto.analyzer.tool.Dictionary

Direct Known Subclasses:

PatternDictionary

public class Dictionary
extends java.lang.Object

Implements a searchable dictionary that can be used by cryptanalysis objects. Each entry in the dictionary consists of a word and its relative frequency. The frequency is stored as an int represented as a String. For example, "the" "38940" "a" "32901" To Test: java Dictionary /usr/share/lib/dict/words *

Field Summary

static int	BIG_DICT
static int	KUCERA_100
static int	KUCERA_340
static int	KUCERA_3500
static int	KUCERA_50
static int	MIN_FREQ

Constructor Summary

Dictionary()
The default constructor reads words from the Unix word list.

Dictionary(java.lang.String filename)

Dictionary(java.lang.String filename, boolean linebreaks)
Creates a dictionary from the named file.

Dictionary(java.lang.String filename, boolean linebreaks, int minfreq)

Method Summary

boolean	contains(java.lang.String word)
java.lang.String	getDescriptor(int i)
java.lang.String	getDictionaryName()
double	getFreq(java.lang.String word)
static void	main(java.lang.String[] args)
int	size()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BIG_DICT

public static final int BIG_DICT

See Also:

Constant Field Values

KUCERA_340

public static final int KUCERA_340

See Also:

Constant Field Values

KUCERA_100

public static final int KUCERA_100

See Also:

Constant Field Values

KUCERA_50

public static final int KUCERA_50

See Also:

Constant Field Values

KUCERA_3500

public static final int KUCERA_3500

See Also:

Constant Field Values

MIN_FREQ

public static final int MIN_FREQ

See Also:

Constant Field Values

Constructor Detail

Dictionary

public Dictionary()

The default constructor reads words from the Unix word list.

Dictionary

public Dictionary(java.lang.String filename)

Dictionary

public Dictionary(java.lang.String filename,
                  boolean linebreaks)

Creates a dictionary from the named file. If linebreaks is true, it assumes the words are listed one per line. Otherwise, it assumes words are listed several per line.

Parameters:

filename - a String giving the name of the dictionary file

linebreaks - set to true iff the words are listed one per line

Dictionary

public Dictionary(java.lang.String filename,
                  boolean linebreaks,
                  int minfreq)

Method Detail

getDictionaryName

public java.lang.String getDictionaryName()

contains

public boolean contains(java.lang.String word)

getFreq

public double getFreq(java.lang.String word)

size

public int size()

getDescriptor

public java.lang.String getDescriptor(int i)

main

public static void main(java.lang.String[] args)