hcrypto.analyzer
Class FreqGaPopulation

java.lang.Object
  |
  +--hcrypto.analyzer.GaPopulation
        |
        +--hcrypto.analyzer.FreqGaPopulation

public class FreqGaPopulation

extends GaPopulation

Field Summary

static int	N_SHUFFLES
static int	NO_CHANGE_LIMIT

Fields inherited from class hcrypto.analyzer.GaPopulation

ciphertext, cleantext, cross_rate, CROSS_RATE, individual, IS_VERBOSE, MAX_GENERATIONS, maxtrials, mutate_rate, MUTATE_RATE, params, POPULATION_SIZE, size, TWEAK_ON, tweakingOn, verbose

Constructor Summary

FreqGaPopulation(java.lang.String text, GaParameters params)
FreqGaPopulation() constructor

Method Summary

void	displayBest()
void	displaySummary()
GaIndividual	getFittest(int n)
void	init() This method initializes the analyzer.
void	run() This method implements the abstract run() method inherited from GaPopulation.

Methods inherited from class java.lang.Object

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

Field Detail

NO_CHANGE_LIMIT

public static final int NO_CHANGE_LIMIT

N_SHUFFLES

public static final int N_SHUFFLES

Constructor Detail

FreqGaPopulation

public FreqGaPopulation(java.lang.String text,
                        GaParameters params)

FreqGaPopulation() constructor

Parameters:

text - -- the text to be cryptanalyzed

params - -- a collection of parameters to control the run

Method Detail

init

public void init()

This method initializes the analyzer. It sorts the tokens in the cryptogram to give preference to those with the smallest (non empty) pattern sets. It then creates the population, giving each individual an encryption key based on a pairing of a token from the cryptogram and a word from the pattern word dictionary.

Overrides:

init in class GaPopulation

run

public void run()

This method implements the abstract run() method inherited from GaPopulation.

Overrides:

run in class GaPopulation

getFittest

public GaIndividual getFittest(int n)

Overrides:

getFittest in class GaPopulation

displayBest

public void displayBest()

displaySummary

public void displaySummary()