public void Encrypt()
{
UiServices.SetBusyState();
MatrixND mesMat = new MatrixND(1, 1);
mesMat[0, 0] = int.Parse(Message);
Cipher = LWE.Encrypt(mesMat)[0, 0].ToString();
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(new Bold(new Underline(new Run("** " + Languages.buttonEncrypt + " **\r\n"))));
paragraph.Inlines.Add(new Bold(new Run(Languages.labelPlainText)));
paragraph.Inlines.Add(" " + Message + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelCiphertext)));
paragraph.Inlines.Add(" " + Cipher + "\r\n");
if (History.Document.Blocks.FirstBlock != null)
{
History.Document.Blocks.InsertBefore(History.Document.Blocks.FirstBlock, paragraph);
}
else
{
History.Document.Blocks.Add(paragraph);
}
NotifyPropertyChanged("Cipher");
}
public bool CheckCipherFormat()
{
try
{
cipher = new MatrixND(1, 1);
cipher[0, 0] = Convert.ToDouble(Cipher);
return(true);
}
catch (Exception)
{
return(false);
}
}
public void GenerateNewLWE(int dim, int q)
{
UiServices.SetBusyState();
LWE = new LWEModel(dim, 1, q, true);
LWE.GenerateNewRandomVector();
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(new Bold(new Underline(new Run("** " + Languages.buttonGenerateNewCryptosystem + " **\r\n"))));
paragraph.Inlines.Add(new Bold(new Run(Languages.labelPrivateKeyS + ":")));
paragraph.Inlines.Add(" " + LWE.S + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelPublicKeyA + ":")));
paragraph.Inlines.Add(" " + LWE.A + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelAlpha)));
paragraph.Inlines.Add(" " + Util.FormatDoubleLog(LWE.alpha) + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelPublicKeyB2 + ":")));
paragraph.Inlines.Add(" " + LWE.B + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelModuloQ)));
paragraph.Inlines.Add(" " + LWE.q + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelRandomVectorR)));
paragraph.Inlines.Add(" " + MatrixND.Transpose(LWE.r) + "\r\n");
paragraph.Inlines.Add(new Bold(new Run(Languages.labelSubsetU)));
paragraph.Inlines.Add(" " + MatrixND.Transpose(LWE.u) + "\r\n");
if (History.Document.Blocks.FirstBlock != null)
{
History.Document.Blocks.InsertBefore(History.Document.Blocks.FirstBlock, paragraph);
}
else
{
History.Document.Blocks.Add(paragraph);
}
NotifyPropertyChanged("RandomVectorR");
NotifyPropertyChanged("SubsetU");
}
public LatticeManualInputView(int newN, int newM, int newMod, MatrixND currentMatrix, bool notAllowDetZero, List <BigInteger> allowedNumbers)
: this(newN, newM, currentMatrix.ToLatticeND(), false, notAllowDetZero, newMod, allowedNumbers)
{
}
public void LWETest()
{
//Test for single bit encryption
//Example taken from my own master thesis (sadly in the absence of an alternative example)
VectorND[] SVectors =
{
new VectorND(new BigInteger[] { 7, 7 })
};
LatticeND S = new LatticeND(SVectors, false);
VectorND[] AVectors =
{
new VectorND(new BigInteger[] { 4, 3, 4, 0, 5 }),
new VectorND(new BigInteger[] { 3, 3, 0, 7, 1 })
};
LatticeND A = new LatticeND(AVectors, false);
VectorND[] eVectors =
{
new VectorND(new BigInteger[] { 7, 2, 4, 5, 2 })
};
LatticeND e = new LatticeND(eVectors, false);
const int q = 9;
LWEModel lwe = new LWEModel(S.ToMatrixND(), A.ToMatrixND(), e.ToMatrixND(), q, 1);
VectorND[] rVectors =
{
new VectorND(new BigInteger[] { 1, 1, 0, 0, 0 })
};
LatticeND r = new LatticeND(rVectors, false);
r.Transpose();
lwe.SetRandomVector(r.ToMatrixND());
//Cryptosystem correct?
VectorND[] BVectors =
{
new VectorND(new BigInteger[] { 2, 8, 5, 0, 8 })
};
LatticeND B = new LatticeND(BVectors, false);
Assert.AreEqual(B.ToMatrixND().ToString(), lwe.B.ToString());
//Encryption and decryption correct?
//Message = 0
MatrixND messageMatrix = new MatrixND(1, 1);
messageMatrix[0, 0] = 0;
MatrixND cipher = lwe.Encrypt(messageMatrix);
MatrixND expectedCipherMatrix = new MatrixND(1, 1);
expectedCipherMatrix[0, 0] = 1;
Assert.AreEqual(cipher.ToString(), expectedCipherMatrix.ToString());
MatrixND decryptedMessage = lwe.Decrypt(cipher);
Assert.AreEqual(messageMatrix.ToString(), decryptedMessage.ToString());
//Message = 1
messageMatrix[0, 0] = 1;
cipher = lwe.Encrypt(messageMatrix);
expectedCipherMatrix[0, 0] = 5;
Assert.AreEqual(cipher.ToString(), expectedCipherMatrix.ToString());
decryptedMessage = lwe.Decrypt(cipher);
Assert.AreEqual(messageMatrix.ToString(), decryptedMessage.ToString());
}
