//constructor for debugging , because it enables to pass secretkey which will not happen in real life
// special parameters :
// batchsize - number of batches sample in one ciphertext ,if the client batches mulitple samples in the ciphertet .
// featureSize - number of features in sample
private Svc(double[][] vectors, double[][] coefficients, double[] intercepts, String kernel, double gamma, double coef0, ulong degree, int power, PublicKey publicKey, SecretKey secretKey, RelinKeys relinKeys, GaloisKeys galoisKeys, int batchSize, int featureSize)
{
this._vectors = vectors;
this._coefficients = coefficients;
this._intercepts = intercepts;
this._kernel = (Kernel)System.Enum.Parse(typeof(Kernel), kernel);
this._gamma = gamma;
this._coef0 = coef0;
this._degree = degree;
this._power = power;
//Use the ckks SCheme
EncryptionParameters parms = new EncryptionParameters(SchemeType.CKKS);
// polyModulusDegree and CoeffModulus used for general SVM algorithm and depends on the polynomial kernel degree
// ( and the percision constraint ) .
// My implementation can be used up to dgree = 4 , but it can be easly refactored with some oprimizations to higher
// polynomial degree
ulong polyModulusDegree = 16384;
if (power >= 20 && power < 40)
{
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree,
new int[] { 60, 20, 21, 22, 23, 24, 25, 26, 27, 60 });
}
else if (power >= 40 && power < 60)
{
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree,
new int[] { 60, 40, 40, 40, 40, 40, 40, 40, 60 });
}
else if (power == 60)
{
polyModulusDegree = 32768;
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree,
new int[] { 60, 60, 60, 60, 60, 60, 60, 60, 60 });
}
parms.PolyModulusDegree = polyModulusDegree;
_context = new SEALContext(parms);
_publicKey = publicKey;
_secretKey = secretKey;
_relinKeys = relinKeys;
_galoisKeys = galoisKeys;
_evaluator = new Evaluator(_context);
if (_secretKey != null)
{
_decryptor = new Decryptor(_context, _secretKey); //FOR DEBUG ONLY ( not used in real server)
}
_encoder = new CKKSEncoder(_context);
Stopwatch serverInitStopwatch = new Stopwatch();
serverInitStopwatch.Start();
_numOfrowsCount = _vectors.Length; //Number of Support Vectors
_numOfcolumnsCount = _vectors[0].Length; //Number of features in every Support vector
_scale = Math.Pow(2.0, _power);
// vars for batch rotations
_svPlaintexts = new Plaintext[_numOfrowsCount];
//Encode support vectors
_sums = new Ciphertext[_numOfrowsCount];
if (UseBatchInnerProduct)
{
double[] batchVectors = new double[batchSize * featureSize];
for (int i = 0; i < _numOfrowsCount; i++)
{
for (int k = 0; k < batchSize * featureSize; k++)
{
var index0 = k % featureSize;
batchVectors[k] = index0 < _numOfcolumnsCount ? _vectors[i][index0] : 0;
}
_svPlaintexts[i] = new Plaintext();
_encoder.Encode(batchVectors, _scale, _svPlaintexts[i]);
SVCUtilities.SvcUtilities.PrintScale(_svPlaintexts[i], "batch supportVectorsPlaintext" + i);
_sums[i] = new Ciphertext();
}
}
else
{
/////////////////////////////////////////////////////////////////////////
//
// vars for simple inner product
//
// Handle SV
_svPlaintextsArr = new Plaintext[_numOfrowsCount, _numOfcolumnsCount];
//Encode SV
for (int i = 0; i < _numOfrowsCount; i++)
{
for (int j = 0; j < _numOfcolumnsCount; j++)
{
_svPlaintextsArr[i, j] = new Plaintext();
_encoder.Encode(_vectors[i][j] != 0 ? _vectors[i][j] : Zero, _scale, _svPlaintextsArr[i, j]);
SvcUtilities.PrintScale(_svPlaintextsArr[i, j], $"supportVectorsPlaintext[{i}][{j}]");
}
}
// Prepare sum of inner product
_innerProdSums = new Ciphertext[_numOfcolumnsCount];
for (int i = 0; i < _numOfcolumnsCount; i++)
{
_innerProdSums[i] = new Ciphertext();
}
//////////////////////////////////////////////////////////////
}
// Allocate memory for svm secure calculation
_kernels = new Ciphertext[_numOfrowsCount];
_decisionsArr = new Ciphertext[_numOfrowsCount];
_coefArr = new Plaintext[_numOfrowsCount];
for (int i = 0; i < _numOfrowsCount; i++)
{
_kernels[i] = new Ciphertext();
_decisionsArr[i] = new Ciphertext();
_coefArr[i] = new Plaintext();
}
_gamaPlaintext = new Plaintext();
_encoder.Encode(_gamma != 0 ? _gamma : Zero, _scale, _gamaPlaintext);
serverInitStopwatch.Stop();
Console.WriteLine($"server Init elapsed {serverInitStopwatch.ElapsedMilliseconds} ms");
}
// Function for classification of samples
// I follow the SEAL eamples recomandations to rescale and relinearize after each calculation.
// useRelinearizeInplace and useReScale should be always true.
// This parametrs are enabled only for debugging and learning purpose.
public Ciphertext Predict(Ciphertext featuresCiphertexts, bool useRelinearizeInplace, bool useReScale,
Stopwatch innerProductStopwatch, Stopwatch degreeStopwatch, Stopwatch negateStopwatch, Stopwatch serverDecisionStopWatch)
{
Ciphertext tempCt = new Ciphertext();
// Level 1
for (int i = 0; i < _numOfrowsCount; i++)
{
//inner product
//calculate IP = < x, x'>
innerProductStopwatch.Start();
if (UseBatchInnerProduct)
{
_kernels[i] = InnerProduct(featuresCiphertexts, _svPlaintexts, i, _sums, _numOfcolumnsCount, tempCt);
}
innerProductStopwatch.Stop();
SvcUtilities.PrintCyprherText(_decryptor, _kernels[i], _encoder, $"inner product TotalValue {i}");
SvcUtilities.PrintScale(_kernels[i], "0. kernels" + i);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(_kernels[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(_kernels[i]);
}
SvcUtilities.PrintScale(_kernels[i], "1. kernels" + i);
_kernels[i].Scale = _scale;
//For polynimial kernel calculate
if (_kernel == Kernel.Poly)
{
// calculate (y *IP+r)^d
// IP is calculated previously
// y = gamma
// r = _coef0
if (useReScale)
{
ParmsId lastParmsId = _kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(_gamaPlaintext, lastParmsId);
}
//calculate y * IP
_evaluator.MultiplyPlainInplace(_kernels[i], _gamaPlaintext);
SvcUtilities.PrintScale(_kernels[i], "2. kernels" + i);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(_kernels[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(_kernels[i]);
}
SvcUtilities.PrintScale(_kernels[i], "3. kernels" + i);
// add r
if (Math.Abs(_coef0) > 0)
{
Plaintext coef0Plaintext = new Plaintext();
_encoder.Encode(_coef0, _kernels[i].Scale, coef0Plaintext);
if (useReScale)
{
ParmsId lastParmsId = _kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(coef0Plaintext, lastParmsId);
}
//kernels[i].Scale = coef0Plaintext.Scale;
_evaluator.AddPlainInplace(_kernels[i], coef0Plaintext);
}
SvcUtilities.PrintScale(_kernels[i], "4. kernels" + i);
degreeStopwatch.Start();
// calculate the polynom degree
var kernel = new Ciphertext(_kernels[i]);
for (int d = 0; d < (int)_degree - 1; d++)
{
kernel.Scale = _kernels[i].Scale;
if (useReScale)
{
ParmsId lastParmsId = _kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(kernel, lastParmsId);
}
_evaluator.MultiplyInplace(_kernels[i], kernel);
SvcUtilities.PrintScale(_kernels[i], d + " 5. kernels" + i);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(_kernels[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(_kernels[i]);
}
SvcUtilities.PrintScale(_kernels[i], d + " rescale 6. kernels" + i);
}
SvcUtilities.PrintScale(_kernels[i], "7. kernels" + i);
degreeStopwatch.Stop();
}
negateStopwatch.Start();
_evaluator.NegateInplace(_kernels[i]);
negateStopwatch.Stop();
SvcUtilities.PrintScale(_kernels[i], "8. kernel" + i);
SvcUtilities.PrintCyprherText(_decryptor, _kernels[i], _encoder, "kernel" + i);
}
serverDecisionStopWatch.Start();
// Encode coefficients : ParmsId! , scale!
double scale2 = Math.Pow(2.0, _power);
if (useReScale)
{
scale2 = _kernels[0].Scale;
}
for (int i = 0; i < _numOfrowsCount; i++)
{
_encoder.Encode(_coefficients[0][i], scale2, _coefArr[i]);
SvcUtilities.PrintScale(_coefArr[i], "coefPlainText" + i);
}
if (useReScale)
{
for (int i = 0; i < _numOfrowsCount; i++)
{
ParmsId lastParmsId = _kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(_coefArr[i], lastParmsId);
}
}
// Level 2
// Calculate decisionArr
for (int i = 0; i < _numOfrowsCount; i++)
{
_evaluator.MultiplyPlain(_kernels[i], _coefArr[i], _decisionsArr[i]);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(_decisionsArr[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(_decisionsArr[i]);
}
SvcUtilities.PrintScale(_decisionsArr[i], "decision" + i);
SvcUtilities.PrintCyprherText(_decryptor, _decisionsArr[i], _encoder, "decision" + i);
}
// Calculate decisionTotal
Ciphertext decisionTotal = new Ciphertext();
//=================================================================
_evaluator.AddMany(_decisionsArr, decisionTotal);
//=================================================================
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
SvcUtilities.PrintCyprherText(_decryptor, decisionTotal, _encoder, "decision total");
// Encode intercepts : ParmsId! , scale!
Plaintext interceptsPlainText = new Plaintext();
double scale3 = Math.Pow(2.0, _power * 3);
if (useReScale)
{
scale3 = decisionTotal.Scale;
}
_encoder.Encode(_intercepts[0], scale3, interceptsPlainText);
if (useReScale)
{
ParmsId lastParmsId = decisionTotal.ParmsId;
_evaluator.ModSwitchToInplace(interceptsPlainText, lastParmsId);
}
SvcUtilities.PrintScale(interceptsPlainText, "interceptsPlainText");
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
//// Calculate finalTotal
Ciphertext finalTotal = new Ciphertext();
//=================================================================
_evaluator.AddPlainInplace(decisionTotal, interceptsPlainText);
//=================================================================
SvcUtilities.PrintScale(decisionTotal, "decisionTotal"); //Level 3
List <double> result = SvcUtilities.PrintCyprherText(_decryptor, decisionTotal, _encoder, "finalTotal", true);
serverDecisionStopWatch.Stop();
long innerProductMilliseconds = innerProductStopwatch.ElapsedMilliseconds;
//Console.WriteLine($"server innerProductStopwatch elapsed {innerProductMilliseconds} ms");
long negateMilliseconds = negateStopwatch.ElapsedMilliseconds;
//Console.WriteLine($"server negateStopwatch elapsed {negateMilliseconds} ms");
long degreeMilliseconds = degreeStopwatch.ElapsedMilliseconds;
//Console.WriteLine($"server degreeStopwatch elapsed {degreeMilliseconds} ms");
long serverDecisionMilliseconds = serverDecisionStopWatch.ElapsedMilliseconds;
//Console.WriteLine($"server Decision elapsed {serverDecisionMilliseconds} ms");
return(decisionTotal);
}
public int Predict(double[] features, int power, bool useRelinearizeInplace, bool useReScale, Stopwatch timePredictSum)
{
EncryptionParameters parms = new EncryptionParameters(SchemeType.CKKS);
if (power < 60)
{
ulong polyModulusDegree = 8192;
parms.PolyModulusDegree = polyModulusDegree;
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree, new int[] { 60, 40, 40, 60 });
}
else
{
ulong polyModulusDegree = 16384;
parms.PolyModulusDegree = polyModulusDegree;
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree, new int[] { 60, 60, 60, 60, 60, 60 });
}
//
double scale = Math.Pow(2.0, power);
SEALContext context = new SEALContext(parms);
Console.WriteLine();
KeyGenerator keygen = new KeyGenerator(context);
PublicKey publicKey = keygen.PublicKey;
SecretKey secretKey = keygen.SecretKey;
RelinKeys relinKeys = keygen.RelinKeys();
Encryptor encryptor = new Encryptor(context, publicKey);
Evaluator evaluator = new Evaluator(context);
Decryptor decryptor = new Decryptor(context, secretKey);
CKKSEncoder encoder = new CKKSEncoder(context);
ulong slotCount = encoder.SlotCount;
Console.WriteLine($"Number of slots: {slotCount}");
timePredictSum.Start();
Plaintext fPlaintext0 = new Plaintext();
Plaintext fPlaintext1 = new Plaintext();
Plaintext fPlaintext2 = new Plaintext();
Plaintext fPlaintext3 = new Plaintext();
encoder.Encode(features[0], scale, fPlaintext0);
encoder.Encode(features[1], scale, fPlaintext1);
encoder.Encode(features[2], scale, fPlaintext2);
encoder.Encode(features[3], scale, fPlaintext3);
SvcUtilities.PrintScale(fPlaintext0, "fPlaintext0");
SvcUtilities.PrintScale(fPlaintext1, "fPlaintext1");
SvcUtilities.PrintScale(fPlaintext2, "fPlaintext2");
Ciphertext f0Encrypted = new Ciphertext();
Ciphertext f1Encrypted = new Ciphertext();
Ciphertext f2Encrypted = new Ciphertext();
Ciphertext f3Encrypted = new Ciphertext();
encryptor.Encrypt(fPlaintext0, f0Encrypted);
encryptor.Encrypt(fPlaintext1, f1Encrypted);
encryptor.Encrypt(fPlaintext2, f2Encrypted);
encryptor.Encrypt(fPlaintext3, f3Encrypted);
SvcUtilities.PrintScale(f0Encrypted, "f0Encrypted");
SvcUtilities.PrintScale(f1Encrypted, "f1Encrypted");
SvcUtilities.PrintScale(f2Encrypted, "f2Encrypted");
Plaintext v00Plaintext1 = new Plaintext();
Plaintext v01Plaintext1 = new Plaintext();
Plaintext v02Plaintext1 = new Plaintext();
Plaintext v03Plaintext1 = new Plaintext();
Plaintext v10Plaintext1 = new Plaintext();
Plaintext v11Plaintext1 = new Plaintext();
Plaintext v12Plaintext1 = new Plaintext();
Plaintext v13Plaintext1 = new Plaintext();
Plaintext v20Plaintext1 = new Plaintext();
Plaintext v21Plaintext1 = new Plaintext();
Plaintext v22Plaintext1 = new Plaintext();
Plaintext v23Plaintext1 = new Plaintext();
encoder.Encode(_vectors[0][0], scale, v00Plaintext1);
encoder.Encode(_vectors[0][1], scale, v01Plaintext1);
encoder.Encode(_vectors[0][2], scale, v02Plaintext1);
encoder.Encode(_vectors[0][3], scale, v03Plaintext1);
encoder.Encode(_vectors[1][0], scale, v10Plaintext1);
encoder.Encode(_vectors[1][1], scale, v11Plaintext1);
encoder.Encode(_vectors[1][2], scale, v12Plaintext1);
encoder.Encode(_vectors[1][3], scale, v13Plaintext1);
encoder.Encode(_vectors[2][0], scale, v20Plaintext1);
encoder.Encode(_vectors[2][1], scale, v21Plaintext1);
encoder.Encode(_vectors[2][2], scale, v22Plaintext1);
encoder.Encode(_vectors[2][3], scale, v23Plaintext1);
SvcUtilities.PrintScale(v00Plaintext1, "v00Plaintext1");
SvcUtilities.PrintScale(v01Plaintext1, "v01Plaintext1");
SvcUtilities.PrintScale(v02Plaintext1, "v02Plaintext1");
SvcUtilities.PrintScale(v03Plaintext1, "v03Plaintext1");
SvcUtilities.PrintScale(v10Plaintext1, "v10Plaintext1");
SvcUtilities.PrintScale(v11Plaintext1, "v11Plaintext1");
SvcUtilities.PrintScale(v12Plaintext1, "v12Plaintext1");
SvcUtilities.PrintScale(v13Plaintext1, "v13Plaintext1");
SvcUtilities.PrintScale(v20Plaintext1, "v20Plaintext1");
SvcUtilities.PrintScale(v21Plaintext1, "v21Plaintext1");
SvcUtilities.PrintScale(v22Plaintext1, "v22Plaintext1");
SvcUtilities.PrintScale(v23Plaintext1, "v23Plaintext1");
Plaintext coef00PlainText = new Plaintext();
Plaintext coef01PlainText = new Plaintext();
Plaintext coef02PlainText = new Plaintext();
Ciphertext tSum1 = new Ciphertext();
Ciphertext tSum2 = new Ciphertext();
Ciphertext tSum3 = new Ciphertext();
Ciphertext tSum4 = new Ciphertext();
Ciphertext kernel0 = new Ciphertext();
//Level 1->2
//=================================================================
evaluator.MultiplyPlain(f0Encrypted, v00Plaintext1, tSum1);
evaluator.MultiplyPlain(f1Encrypted, v01Plaintext1, tSum2);
evaluator.MultiplyPlain(f2Encrypted, v02Plaintext1, tSum3);
evaluator.MultiplyPlain(f3Encrypted, v03Plaintext1, tSum4);
//=================================================================
if (useRelinearizeInplace)
{
Console.WriteLine("RelinearizeInplace sums 1");
evaluator.RelinearizeInplace(tSum1, relinKeys);
evaluator.RelinearizeInplace(tSum2, relinKeys);
evaluator.RelinearizeInplace(tSum3, relinKeys);
evaluator.RelinearizeInplace(tSum4, relinKeys);
}
if (useReScale)
{
Console.WriteLine("useReScale sums 1");
evaluator.RescaleToNextInplace(tSum1);
evaluator.RescaleToNextInplace(tSum2);
evaluator.RescaleToNextInplace(tSum3);
evaluator.RescaleToNextInplace(tSum4);
}
SvcUtilities.PrintScale(tSum1, "tSum1"); //Level 2
SvcUtilities.PrintScale(tSum2, "tSum2"); //Level 2
SvcUtilities.PrintScale(tSum3, "tSum3"); //Level 2
SvcUtilities.PrintScale(tSum4, "tSum4"); //Level 2
var ciphertexts1 = new List <Ciphertext>();
ciphertexts1.Add(tSum1);
ciphertexts1.Add(tSum2);
ciphertexts1.Add(tSum3);
ciphertexts1.Add(tSum4);
//=================================================================
evaluator.AddMany(ciphertexts1, kernel0); //Level 2
//=================================================================
SvcUtilities.PrintScale(kernel0, "kernel0"); //Level 2
SvcUtilities.PrintCyprherText(decryptor, kernel0, encoder, "kernel0");
Ciphertext kernel1 = new Ciphertext();
//Level 1-> 2
//=================================================================
evaluator.MultiplyPlain(f0Encrypted, v10Plaintext1, tSum1);
evaluator.MultiplyPlain(f1Encrypted, v11Plaintext1, tSum2);
evaluator.MultiplyPlain(f2Encrypted, v12Plaintext1, tSum3);
evaluator.MultiplyPlain(f3Encrypted, v13Plaintext1, tSum4);
//=================================================================
if (useRelinearizeInplace)
{
Console.WriteLine("RelinearizeInplace sums 2");
evaluator.RelinearizeInplace(tSum1, relinKeys);
evaluator.RelinearizeInplace(tSum2, relinKeys);
evaluator.RelinearizeInplace(tSum3, relinKeys);
evaluator.RelinearizeInplace(tSum4, relinKeys);
}
if (useReScale)
{
Console.WriteLine("useReScale sums 2");
evaluator.RescaleToNextInplace(tSum1);
evaluator.RescaleToNextInplace(tSum2);
evaluator.RescaleToNextInplace(tSum3);
evaluator.RescaleToNextInplace(tSum4);
}
ciphertexts1.Add(tSum1);
ciphertexts1.Add(tSum2);
ciphertexts1.Add(tSum3);
ciphertexts1.Add(tSum4);
Console.WriteLine("Second time : ");
SvcUtilities.PrintScale(tSum1, "tSum1"); //Level 2
SvcUtilities.PrintScale(tSum2, "tSum2"); //Level 2
SvcUtilities.PrintScale(tSum3, "tSum3"); //Level 2
SvcUtilities.PrintScale(tSum4, "tSum4"); //Level 2
var ciphertexts2 = new List <Ciphertext>();
ciphertexts2.Add(tSum1);
ciphertexts2.Add(tSum2);
ciphertexts2.Add(tSum3);
ciphertexts2.Add(tSum4);
//=================================================================
evaluator.AddMany(ciphertexts2, kernel1); // Level 2
//=================================================================
SvcUtilities.PrintScale(kernel1, "kernel1");
SvcUtilities.PrintCyprherText(decryptor, kernel1, encoder, "kernel1");
Ciphertext kernel2 = new Ciphertext();
//Level 1->2
//=================================================================
evaluator.MultiplyPlain(f0Encrypted, v20Plaintext1, tSum1);
evaluator.MultiplyPlain(f1Encrypted, v21Plaintext1, tSum2);
evaluator.MultiplyPlain(f2Encrypted, v22Plaintext1, tSum3);
evaluator.MultiplyPlain(f3Encrypted, v23Plaintext1, tSum4);
//=================================================================
if (useRelinearizeInplace)
{
Console.WriteLine("RelinearizeInplace sums 3");
evaluator.RelinearizeInplace(tSum1, relinKeys);
evaluator.RelinearizeInplace(tSum2, relinKeys);
evaluator.RelinearizeInplace(tSum3, relinKeys);
evaluator.RelinearizeInplace(tSum4, relinKeys);
}
if (useReScale)
{
Console.WriteLine("useReScale sums 3");
evaluator.RescaleToNextInplace(tSum1);
evaluator.RescaleToNextInplace(tSum2);
evaluator.RescaleToNextInplace(tSum3);
evaluator.RescaleToNextInplace(tSum4);
}
var ciphertexts3 = new List <Ciphertext>();
ciphertexts3.Add(tSum1);
ciphertexts3.Add(tSum2);
ciphertexts3.Add(tSum3);
ciphertexts3.Add(tSum4);
Console.WriteLine("Third time : ");
SvcUtilities.PrintScale(tSum1, "tSum1"); //Level 2
SvcUtilities.PrintScale(tSum2, "tSum2"); //Level 2
SvcUtilities.PrintScale(tSum3, "tSum3"); //Level 2
SvcUtilities.PrintScale(tSum4, "tSum4"); //Level 2
//=================================================================
evaluator.AddMany(ciphertexts3, kernel2);
//=================================================================
SvcUtilities.PrintScale(kernel2, "kernel2"); //Level 2
SvcUtilities.PrintCyprherText(decryptor, kernel2, encoder, "kernel2");
Ciphertext decision1 = new Ciphertext();
Ciphertext decision2 = new Ciphertext();
Ciphertext decision3 = new Ciphertext();
SvcUtilities.PrintScale(decision1, "decision1"); //Level 0
SvcUtilities.PrintScale(decision2, "decision2"); //Level 0
SvcUtilities.PrintScale(decision3, "decision3"); //Level 0
Ciphertext nKernel0 = new Ciphertext();
Ciphertext nKernel1 = new Ciphertext();
Ciphertext nKernel2 = new Ciphertext();
//=================================================================
evaluator.Negate(kernel0, nKernel0);
evaluator.Negate(kernel1, nKernel1); //Level 2
evaluator.Negate(kernel2, nKernel2); //Level 2
//=================================================================
//nKernel0.Scale = scale;
//nKernel1.Scale = scale;
//nKernel2.Scale = scale;
double scale2 = Math.Pow(2.0, power);
if (useReScale)
{
scale2 = nKernel0.Scale;
}
encoder.Encode(_coefficients[0][0], scale2, coef00PlainText);
encoder.Encode(_coefficients[0][1], scale2, coef01PlainText);
encoder.Encode(_coefficients[0][2], scale2, coef02PlainText);
SvcUtilities.PrintScale(coef00PlainText, "coef00PlainText");
SvcUtilities.PrintScale(coef01PlainText, "coef01PlainText");
SvcUtilities.PrintScale(coef02PlainText, "coef02PlainText");
if (useReScale)
{
ParmsId lastParmsId = nKernel0.ParmsId;
evaluator.ModSwitchToInplace(coef00PlainText, lastParmsId);
lastParmsId = nKernel1.ParmsId;
evaluator.ModSwitchToInplace(coef01PlainText, lastParmsId);
lastParmsId = nKernel2.ParmsId;
evaluator.ModSwitchToInplace(coef02PlainText, lastParmsId);
}
SvcUtilities.PrintScale(nKernel0, "nKernel0"); //Level 2
SvcUtilities.PrintScale(nKernel1, "nKernel1"); //Level 2
SvcUtilities.PrintScale(nKernel2, "nKernel2"); //Level 2
//Level 2->3
//=================================================================
evaluator.MultiplyPlain(nKernel0, coef00PlainText, decision1);
evaluator.MultiplyPlain(nKernel1, coef01PlainText, decision2);
evaluator.MultiplyPlain(nKernel2, coef02PlainText, decision3);
//=================================================================
if (useRelinearizeInplace)
{
Console.WriteLine("RelinearizeInplace decisions");
evaluator.RelinearizeInplace(decision1, relinKeys);
evaluator.RelinearizeInplace(decision2, relinKeys);
evaluator.RelinearizeInplace(decision3, relinKeys);
}
if (useReScale)
{
Console.WriteLine("Rescale decisions");
evaluator.RescaleToNextInplace(decision1);
evaluator.RescaleToNextInplace(decision2);
evaluator.RescaleToNextInplace(decision3);
}
SvcUtilities.PrintScale(decision1, "decision1"); //Level 3
SvcUtilities.PrintScale(decision2, "decision2"); //Level 3
SvcUtilities.PrintScale(decision3, "decision3"); //Level 3
SvcUtilities.PrintCyprherText(decryptor, decision1, encoder, "decision1");
SvcUtilities.PrintCyprherText(decryptor, decision2, encoder, "decision2");
SvcUtilities.PrintCyprherText(decryptor, decision3, encoder, "decision3");
//=================================================================
//evaluator.RelinearizeInplace(decision1,keygen.RelinKeys());
//evaluator.RelinearizeInplace(decision2, keygen.RelinKeys());
//evaluator.RelinearizeInplace(decision3, keygen.RelinKeys());
//=================================================================
//PrintScale(decision1, "decision1");
var decisions = new List <Ciphertext>();
decisions.Add(decision1);
decisions.Add(decision2);
decisions.Add(decision3);
Ciphertext decisionTotal = new Ciphertext();
//=================================================================
evaluator.AddMany(decisions, decisionTotal);
//=================================================================
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
SvcUtilities.PrintCyprherText(decryptor, decisionTotal, encoder, "decision total");
Ciphertext finalTotal = new Ciphertext();
Plaintext interceptsPlainText = new Plaintext();
double scale3 = Math.Pow(2.0, power * 3);
if (useReScale)
{
scale3 = decisionTotal.Scale;
}
encoder.Encode(_intercepts[0], scale3, interceptsPlainText);
if (useReScale)
{
ParmsId lastParmsId = decisionTotal.ParmsId;
evaluator.ModSwitchToInplace(interceptsPlainText, lastParmsId);
}
SvcUtilities.PrintScale(interceptsPlainText, "interceptsPlainText");
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
//=================================================================
evaluator.AddPlainInplace(decisionTotal, interceptsPlainText);
//=================================================================
timePredictSum.Stop();
SvcUtilities.PrintScale(decisionTotal, "decisionTotal"); //Level 3
List <double> result = SvcUtilities.PrintCyprherText(decryptor, decisionTotal, encoder, "finalTotal");
using (System.IO.StreamWriter file =
new System.IO.StreamWriter(
$@"{OutputDir}IrisSimple_IrisSecureSVC_total_{power}_{useRelinearizeInplace}_{useReScale}.txt", !_firstTime)
)
{
_firstTime = false;
file.WriteLine($"{result[0]}");
}
if (result[0] > 0)
{
return(0);
}
return(1);
}
public int Predict(double[] features, int power, bool useRelinearizeInplace, bool useReScale, Stopwatch timePredictSum)
{
EncryptionParameters parms = new EncryptionParameters(SchemeType.CKKS);
if (power < 60)
{
ulong polyModulusDegree = 8192;
parms.PolyModulusDegree = polyModulusDegree;
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree, new int[] { 60, 40, 40, 60 });
}
else
{
ulong polyModulusDegree = 16384;
parms.PolyModulusDegree = polyModulusDegree;
parms.CoeffModulus = CoeffModulus.Create(polyModulusDegree, new int[] { 60, 60, 60, 60, 60, 60 });
}
//
double scale = Math.Pow(2.0, power);
SEALContext context = new SEALContext(parms);
Console.WriteLine();
KeyGenerator keygen = new KeyGenerator(context);
PublicKey publicKey = keygen.PublicKey;
SecretKey secretKey = keygen.SecretKey;
RelinKeys relinKeys = keygen.RelinKeys();
Encryptor encryptor = new Encryptor(context, publicKey);
Evaluator evaluator = new Evaluator(context);
Decryptor decryptor = new Decryptor(context, secretKey);
CKKSEncoder encoder = new CKKSEncoder(context);
ulong slotCount = encoder.SlotCount;
Console.WriteLine($"Number of slots: {slotCount}");
timePredictSum.Start();
var featuresLength = features.Length;
var plaintexts = new Plaintext[featuresLength];
var featuresCiphertexts = new Ciphertext[featuresLength];
//Encode and encrypt features
for (int i = 0; i < featuresLength; i++)
{
plaintexts[i] = new Plaintext();
encoder.Encode(features[i], scale, plaintexts[i]);
SvcUtilities.PrintScale(plaintexts[i], "featurePlaintext" + i);
featuresCiphertexts[i] = new Ciphertext();
encryptor.Encrypt(plaintexts[i], featuresCiphertexts[i]);
SvcUtilities.PrintScale(featuresCiphertexts[i], "featurefEncrypted" + i);
}
// Handle SV
var numOfrows = _vectors.Length;
var numOfcolumns = _vectors[0].Length;
var svPlaintexts = new Plaintext[numOfrows, numOfcolumns];
//Encode SV
for (int i = 0; i < numOfrows; i++)
{
for (int j = 0; j < numOfcolumns; j++)
{
svPlaintexts[i, j] = new Plaintext();
encoder.Encode(_vectors[i][j], scale, svPlaintexts[i, j]);
SvcUtilities.PrintScale(svPlaintexts[i, j], "supportVectorsPlaintext" + i + j);
}
}
// Prepare sum of inner product
var sums = new Ciphertext[numOfcolumns];
for (int i = 0; i < numOfcolumns; i++)
{
sums[i] = new Ciphertext();
}
var kernels = new Ciphertext[numOfrows];
var decisionsArr = new Ciphertext[numOfrows];
var coefArr = new Plaintext [numOfrows];
for (int i = 0; i < numOfrows; i++)
{
kernels[i] = new Ciphertext();
decisionsArr[i] = new Ciphertext();
coefArr[i] = new Plaintext();
}
// Level 1
for (int i = 0; i < numOfrows; i++)
{
var ciphertexts = new List <Ciphertext>();
//inner product
for (int j = 0; j < numOfcolumns; j++)
{
evaluator.MultiplyPlain(featuresCiphertexts[j], svPlaintexts[i, j], sums[j]);
if (useRelinearizeInplace)
{
evaluator.RelinearizeInplace(sums[j], relinKeys);
}
if (useReScale)
{
evaluator.RescaleToNextInplace(sums[j]);
}
SvcUtilities.PrintScale(sums[j], "tSum" + j);
}
evaluator.AddMany(sums, kernels[i]);
evaluator.NegateInplace(kernels[i]);
SvcUtilities.PrintScale(kernels[i], "kernel" + i);
SvcUtilities.PrintCyprherText(decryptor, kernels[i], encoder, "kernel" + i);
}
// Encode coefficients : ParmsId! , scale!
double scale2 = Math.Pow(2.0, power);
if (useReScale)
{
scale2 = kernels[0].Scale;
}
for (int i = 0; i < numOfrows; i++)
{
encoder.Encode(_coefficients[0][i], scale2, coefArr[i]);
SvcUtilities.PrintScale(coefArr[i], "coefPlainText+i");
}
if (useReScale)
{
for (int i = 0; i < numOfrows; i++)
{
ParmsId lastParmsId = kernels[i].ParmsId;
evaluator.ModSwitchToInplace(coefArr[i], lastParmsId);
}
}
// Level 2
// Calculate decisionArr
for (int i = 0; i < numOfrows; i++)
{
evaluator.MultiplyPlain(kernels[i], coefArr[i], decisionsArr[i]);
if (useRelinearizeInplace)
{
evaluator.RelinearizeInplace(decisionsArr[i], relinKeys);
}
if (useReScale)
{
evaluator.RescaleToNextInplace(decisionsArr[i]);
}
SvcUtilities.PrintScale(decisionsArr[i], "decision" + i);
SvcUtilities.PrintCyprherText(decryptor, decisionsArr[i], encoder, "decision" + i);
}
// Calculate decisionTotal
Ciphertext decisionTotal = new Ciphertext();
//=================================================================
evaluator.AddMany(decisionsArr, decisionTotal);
//=================================================================
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
SvcUtilities.PrintCyprherText(decryptor, decisionTotal, encoder, "decision total");
// Encode intercepts : ParmsId! , scale!
Plaintext interceptsPlainText = new Plaintext();
double scale3 = Math.Pow(2.0, power * 3);
if (useReScale)
{
scale3 = decisionTotal.Scale;
}
encoder.Encode(_intercepts[0], scale3, interceptsPlainText);
if (useReScale)
{
ParmsId lastParmsId = decisionTotal.ParmsId;
evaluator.ModSwitchToInplace(interceptsPlainText, lastParmsId);
}
SvcUtilities.PrintScale(interceptsPlainText, "interceptsPlainText");
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
//// Calculate finalTotal
Ciphertext finalTotal = new Ciphertext();
//=================================================================
evaluator.AddPlainInplace(decisionTotal, interceptsPlainText);
//=================================================================
timePredictSum.Stop();
SvcUtilities.PrintScale(decisionTotal, "decisionTotal"); //Level 3
List <double> result = SvcUtilities.PrintCyprherText(decryptor, decisionTotal, encoder, "finalTotal");
using (System.IO.StreamWriter file =
new System.IO.StreamWriter(
$@"{OutputDir}IrisLinear_IrisSecureSVC_total_{power}_{useRelinearizeInplace}_{useReScale}.txt", !_firstTime)
)
{
_firstTime = false;
file.WriteLine($"{result[0]}");
}
if (result[0] > 0)
{
return(0);
}
return(1);
}
public int Predict(double[] features, bool useRelinearizeInplace,bool useReScale,out double finalResult)
{
Console.WriteLine();
ulong slotCount = _encoder.SlotCount;
//Console.WriteLine($"Number of slots: {slotCount}");
var featuresLength = features.Length;
var plaintexts = new Plaintext();
var featuresCiphertexts = new Ciphertext();
Stopwatch clientStopwatch = new Stopwatch();
clientStopwatch.Start();
//Encode and encrypt features
double scale = Math.Pow(2.0, _power);
_encoder.Encode(features, scale, plaintexts);
_encryptor.Encrypt(plaintexts, featuresCiphertexts);
SvcUtilities.PrintScale(plaintexts, "featurePlaintext");
SvcUtilities.PrintScale(featuresCiphertexts, "featurefEncrypted");
clientStopwatch.Stop();
Stopwatch serverInitStopwatch = new Stopwatch();
serverInitStopwatch.Start();
// Handle SV
var numOfrowsCount = _vectors.Length;
var numOfcolumnsCount = _vectors[0].Length;
var svPlaintexts = new Plaintext[numOfrowsCount];
//Encode SV
var sums = new Ciphertext[numOfrowsCount];
for (int i = 0; i < numOfrowsCount; i++)
{
svPlaintexts[i] = new Plaintext();
_encoder.Encode(_vectors[i], scale, svPlaintexts[i]);
SvcUtilities.PrintScale(svPlaintexts[i], "supportVectorsPlaintext"+i);
sums[i] = new Ciphertext();
}
var kernels = new Ciphertext[numOfrowsCount];
var decisionsArr = new Ciphertext[numOfrowsCount];
var coefArr = new Plaintext [numOfrowsCount];
for (int i = 0; i < numOfrowsCount; i++)
{
kernels[i] = new Ciphertext();
decisionsArr[i] = new Ciphertext();
coefArr[i] = new Plaintext();
}
Plaintext gamaPlaintext= new Plaintext();
_encoder.Encode(_gamma, scale, gamaPlaintext);
Ciphertext tempCt = new Ciphertext();
serverInitStopwatch.Stop();
Stopwatch innerProductStopwatch = new Stopwatch();
Stopwatch negateStopwatch = new Stopwatch();
Stopwatch degreeStopwatch = new Stopwatch();
// Level 1
for (int i = 0; i < numOfrowsCount; i++)
{
//Console.WriteLine(i);
//inner product
innerProductStopwatch.Start();
_evaluator.MultiplyPlain(featuresCiphertexts, svPlaintexts[i],sums[i]);
int numOfRotations = (int)Math.Ceiling(Math.Log2(numOfcolumnsCount));
for (int k = 1,m=1; m <= numOfRotations/*(int)encoder.SlotCount/2*/; k <<= 1,m++)
{
_evaluator.RotateVector(sums[i], k, _galoisKeys, tempCt);
_evaluator.AddInplace(sums[i], tempCt);
}
innerProductStopwatch.Stop();
kernels[i] = sums[i];
SvcUtilities.PrintCyprherText(_decryptor, kernels[i], _encoder, $"inner product TotalValue {i}" );
SvcUtilities.PrintScale(kernels[i], "0. kernels" + i);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(kernels[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(kernels[i]);
}
SvcUtilities.PrintScale(kernels[i], "1. kernels" + i);
kernels[i].Scale = scale;
if(_kernel == Kernel.Poly)
{
if (useReScale)
{
ParmsId lastParmsId = kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(gamaPlaintext, lastParmsId);
}
_evaluator.MultiplyPlainInplace(kernels[i], gamaPlaintext);
SvcUtilities.PrintScale(kernels[i], "2. kernels" + i);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(kernels[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(kernels[i]);
}
SvcUtilities.PrintScale(kernels[i], "3. kernels" + i);
if (Math.Abs(_coef0) > 0)
{
Plaintext coef0Plaintext = new Plaintext();
_encoder.Encode(_coef0, kernels[i].Scale, coef0Plaintext);
if (useReScale)
{
ParmsId lastParmsId = kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(coef0Plaintext, lastParmsId);
}
//kernels[i].Scale = coef0Plaintext.Scale;
_evaluator.AddPlainInplace(kernels[i], coef0Plaintext);
}
SvcUtilities.PrintScale(kernels[i], "4. kernels" + i);
degreeStopwatch.Start();
var kernel = new Ciphertext(kernels[i]);
for (int d = 0; d < (int)_degree-1; d++)
{
kernel.Scale = kernels[i].Scale;
if (useReScale)
{
ParmsId lastParmsId = kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(kernel, lastParmsId);
}
_evaluator.MultiplyInplace(kernels[i], kernel);
SvcUtilities.PrintScale(kernels[i], d + " 5. kernels" + i);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(kernels[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(kernels[i]);
}
SvcUtilities.PrintScale(kernels[i], d + " rescale 6. kernels" + i);
}
SvcUtilities.PrintScale(kernels[i], "7. kernels" + i);
degreeStopwatch.Stop();
}
negateStopwatch.Start();
_evaluator.NegateInplace(kernels[i]);
negateStopwatch.Stop();
SvcUtilities.PrintScale(kernels[i], "8. kernel"+i);
SvcUtilities.PrintCyprherText(_decryptor, kernels[i], _encoder, "kernel"+i);
}
Stopwatch serverDecisionStopWatch = new Stopwatch();
serverDecisionStopWatch.Start();
// Encode coefficients : ParmsId! , scale!
double scale2 = Math.Pow(2.0, _power);
if (useReScale)
{
scale2 = kernels[0].Scale;
}
for (int i = 0; i < numOfrowsCount; i++)
{
_encoder.Encode(_coefficients[0][i], scale2, coefArr[i]);
SvcUtilities.PrintScale(coefArr[i], "coefPlainText"+i);
}
if (useReScale)
{
for (int i = 0; i < numOfrowsCount; i++)
{
ParmsId lastParmsId = kernels[i].ParmsId;
_evaluator.ModSwitchToInplace(coefArr[i], lastParmsId);
}
}
// Level 2
// Calculate decisionArr
for (int i = 0; i < numOfrowsCount; i++)
{
_evaluator.MultiplyPlain(kernels[i], coefArr[i], decisionsArr[i]);
if (useRelinearizeInplace)
{
_evaluator.RelinearizeInplace(decisionsArr[i], _relinKeys);
}
if (useReScale)
{
_evaluator.RescaleToNextInplace(decisionsArr[i]);
}
SvcUtilities.PrintScale(decisionsArr[i], "decision"+i);
SvcUtilities.PrintCyprherText(_decryptor, decisionsArr[i], _encoder, "decision" + i);
}
// Calculate decisionTotal
Ciphertext decisionTotal = new Ciphertext();
//=================================================================
_evaluator.AddMany(decisionsArr, decisionTotal);
//=================================================================
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
SvcUtilities.PrintCyprherText(_decryptor, decisionTotal, _encoder, "decision total");
// Encode intercepts : ParmsId! , scale!
Plaintext interceptsPlainText = new Plaintext();
double scale3 = Math.Pow(2.0, _power*3);
if (useReScale)
{
scale3 = decisionTotal.Scale;
}
_encoder.Encode(_intercepts[0], scale3, interceptsPlainText);
if (useReScale)
{
ParmsId lastParmsId = decisionTotal.ParmsId;
_evaluator.ModSwitchToInplace(interceptsPlainText, lastParmsId);
}
SvcUtilities.PrintScale(interceptsPlainText, "interceptsPlainText");
SvcUtilities.PrintScale(decisionTotal, "decisionTotal");
//// Calculate finalTotal
Ciphertext finalTotal = new Ciphertext();
//=================================================================
_evaluator.AddPlainInplace(decisionTotal, interceptsPlainText);
//=================================================================
SvcUtilities.PrintScale(decisionTotal, "decisionTotal"); //Level 3
List<double> result = SvcUtilities.PrintCyprherText(_decryptor, decisionTotal, _encoder, "finalTotal",true);
serverDecisionStopWatch.Stop();
Console.WriteLine($"client Init elapsed {clientStopwatch.ElapsedMilliseconds} ms");
Console.WriteLine($"server Init elapsed {serverInitStopwatch.ElapsedMilliseconds} ms");
Console.WriteLine($"server innerProductStopwatch elapsed {innerProductStopwatch.ElapsedMilliseconds} ms");
Console.WriteLine($"server negateStopwatch elapsed {negateStopwatch.ElapsedMilliseconds} ms");
Console.WriteLine($"server degreeStopwatch elapsed {degreeStopwatch.ElapsedMilliseconds} ms");
Console.WriteLine($"server Decision elapsed {serverDecisionStopWatch.ElapsedMilliseconds} ms");
finalResult = result[0];
if (result[0] > 0)
{
return 0;
}
return 1;
}
