public override (string, double) Break(string cipher = null)
{
if (cipher == null)
{
cipher = this.Cipher;
}
string plain = cipher;
double maxProb = FrequencyAnalyst.Analyze(cipher);
for (int i = 1; i < cipher.Length; i++)
{
(string str, bool ok)result = Decode(cipher, i.ToString());
if (result.ok)
{
double prob = FrequencyAnalyst.Analyze(result.str);
if (prob > maxProb)
{
plain = result.str;
maxProb = prob;
}
}
}
this.Plain = plain;
return(plain, Math.Pow(Math.E, maxProb));
}
private List <Individual> CalMutation(Individual id)
{
StringBuilder tmp = new StringBuilder(id.key.Clone() as string);
double fatherFitness = FrequencyAnalyst.Analyze(Decode(tmp.ToString()));
List <Individual> kids = new List <Individual>();
Random rand = new Random();
for (int i = 0; i < Scheme.LetterSetSize; i++)
{
for (int j = 0; j < i; j++)
{
(tmp[i], tmp[j]) = (tmp[j], tmp[i]);
double r = rand.NextDouble();
double newFitness = FrequencyAnalyst.Analyze(Decode(tmp.ToString()));
if (newFitness > fatherFitness)
{
kids.Add(new Individual(tmp.ToString(), this));
}
else if (r <= MutationProb)
{
kids.Add(new Individual(tmp.ToString(), this));
}
(tmp[i], tmp[j]) = (tmp[j], tmp[i]);
}
}
return(kids);
}
public List <int[]> CalMutation(int[] key)
{
int[] tmp = key.Clone() as int[];
double fatherFitness = FrequencyAnalyst.Analyze(Decode(tmp));
List <int[]> kids = new List <int[]>();
Random rand = new Random();
for (int i = 0; i < Scheme.LetterSetSize; i++)
{
for (int j = 0; j < i; j++)
{
(tmp[i], tmp[j]) = (tmp[j], tmp[i]);
double r = rand.NextDouble();
double newFitness = FrequencyAnalyst.Analyze(Decode(tmp));
if (newFitness > fatherFitness)
{
kids.Add(tmp.Clone() as int[]);
}
else if (r <= MutationProb)
{
kids.Add(tmp.Clone() as int[]);
}
(tmp[i], tmp[j]) = (tmp[j], tmp[i]);
}
}
return(kids);
}
public override (string, double) Break(string cipher = null)
{
if (cipher == null)
{
cipher = this.Cipher;
}
string plain = cipher;
double maxProb = FrequencyAnalyst.Analyze(cipher);
for (int i = 0; i < LetterSetSize; i++)
{
if (NumberTheory.Gcd(i, LetterSetSize) == 1)
{
for (int j = 0; j < LetterSetSize; j++)
{
string a = i.ToString();
string b = j.ToString();
string ab = a + "," + b;
(string str, bool ok)result = Decode(cipher, ab);
if (result.ok)
{
double prob = FrequencyAnalyst.Analyze(result.str);
if (prob > maxProb)
{
plain = result.str;
maxProb = prob;
}
}
}
}
}
this.Plain = plain;
ProcessLog.Enqueue(plain);
ProcessLog.Enqueue("");
return(plain, Math.Pow(Math.E, maxProb));
//throw new NotImplementedException();
}
public Individual(string key, IGA iga)
{
this.key = key;
this.fitness = FrequencyAnalyst.Analyze(iga.Decode(key));
}
