hcrypto.analyzer.evolutionary
Class NgramGaIndividual

java.lang.Object
  hcrypto.analyzer.evolutionary.GaIndividual
      hcrypto.analyzer.evolutionary.NgramGaIndividual

All Implemented Interfaces:

java.lang.Comparable

public class NgramGaIndividual
extends GaIndividual
implements java.lang.Comparable

Constructor Summary

NgramGaIndividual(GaIndividual i)
Copy constructor

NgramGaIndividual(java.lang.String text, java.lang.String key, GaParameters params, NgramArray nga)

Method Summary

void	calcFitness() calcFitness creates a cipher object and decrypts the message with the current key.
int	compareTo(java.lang.Object o) Overrides the default version
void	cross(GaIndividual i) One-point crossover: Pick a random point in i1 and i2 and swap up to NN characters starting from that point.
java.lang.String	displayCrossData()
boolean	equals(java.lang.Object i)
java.lang.String	getKey()
int	mutate(double rate) This version of mutate swaps two random characters in the key.
java.lang.String	toString()

Methods inherited from class hcrypto.analyzer.evolutionary.GaIndividual

getDecrypt, getFitness

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NgramGaIndividual

public NgramGaIndividual(java.lang.String text,
                         java.lang.String key,
                         GaParameters params,
                         NgramArray nga)

NgramGaIndividual

public NgramGaIndividual(GaIndividual i)

Copy constructor

Method Detail

equals

public boolean equals(java.lang.Object i)

Overrides:

equals in class java.lang.Object

cross

public void cross(GaIndividual i)

One-point crossover: Pick a random point in i1 and i2 and swap up to NN characters starting from that point.

Specified by:

cross in class GaIndividual

Parameters:

i - an Individual parent

mutate

public int mutate(double rate)

This version of mutate swaps two random characters in the key. The mutation is done with frequency equal to rate. The resulting mutant is discarded if it does not improve the fitness of the individual.

Specified by:

mutate in class GaIndividual

Parameters:

rate - is the mutation rate

calcFitness

public void calcFitness()

calcFitness creates a cipher object and decrypts the message with the current key.

Specified by:

calcFitness in class GaIndividual

compareTo

public int compareTo(java.lang.Object o)

Overrides the default version

Specified by:

compareTo in interface java.lang.Comparable

Overrides:

compareTo in class GaIndividual

displayCrossData

public java.lang.String displayCrossData()

Overrides:

displayCrossData in class GaIndividual

toString

public java.lang.String toString()

Overrides:

toString in class GaIndividual

getKey

public java.lang.String getKey()

Overrides:

getKey in class GaIndividual