本文整理汇总了C++中EncryptedArray::buildLinPolyCoeffs方法的典型用法代码示例。如果您正苦于以下问题：C++ EncryptedArray::buildLinPolyCoeffs方法的具体用法？C++ EncryptedArray::buildLinPolyCoeffs怎么用？C++ EncryptedArray::buildLinPolyCoeffs使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类EncryptedArray的用法示例。
在下文中一共展示了EncryptedArray::buildLinPolyCoeffs方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: incrementalZeroTest
// incrementalZeroTest sets each res[i], for i=0..n-1, to
// a ciphertext in which each slot is 0 or 1 according
// to whether or not bits 0..i of corresponding slot in ctxt
// is zero (1 if not zero, 0 if zero).
// It is assumed that res and each res[i] is already initialized
// by the caller.
// Complexity: O(d + n log d) smart automorphisms
// O(n d)
void incrementalZeroTest(Ctxt* res[], const EncryptedArray& ea,
const Ctxt& ctxt, long n)
{
FHE_TIMER_START;
long nslots = ea.size();
long d = ea.getDegree();
// compute linearized polynomial coefficients
vector< vector<ZZX> > Coeff;
Coeff.resize(n);
for (long i = 0; i < n; i++) {
// coeffients for mask on bits 0..i
// L[j] = X^j for j = 0..i, L[j] = 0 for j = i+1..d-1
vector<ZZX> L;
L.resize(d);
for (long j = 0; j <= i; j++)
SetCoeff(L[j], j);
vector<ZZX> C;
ea.buildLinPolyCoeffs(C, L);
Coeff[i].resize(d);
for (long j = 0; j < d; j++) {
// Coeff[i][j] = to the encoding that has C[j] in all slots
// FIXME: maybe encrtpted array should have this functionality
// built in
vector<ZZX> T;
T.resize(nslots);
for (long s = 0; s < nslots; s++) T[s] = C[j];
ea.encode(Coeff[i][j], T);
}
}
vector<Ctxt> Conj(d, ctxt);
// initialize Cong[j] to ctxt^{2^j}
for (long j = 0; j < d; j++) {
Conj[j].smartAutomorph(1L << j);
}
for (long i = 0; i < n; i++) {
res[i]->clear();
for (long j = 0; j < d; j++) {
Ctxt tmp = Conj[j];
tmp.multByConstant(Coeff[i][j]);
*res[i] += tmp;
}
// *res[i] now has 0..i in each slot
// next, we raise to the power 2^d-1
fastPower(*res[i], d);
}
FHE_TIMER_STOP;
}示例2: extractCoeffs
/**
* @brief Extract coefficients from ciphertext polynomial
* @param coeffs extracted coefficients
* @param ctxt ciphertext
* @param n extract "n" lowest degree coefficients
*/
void extractCoeffs(EncryptedArray& ea, vector<Ctxt>& coeffs, Ctxt& ctxt, long n) {
long d = ea.getDegree();
if (d < n) n = d;
coeffs.clear();
vector<Ctxt> conj;
for (int coeff = 0; coeff < n; ++coeff) {
vector<ZZX> LM(d);
LM[coeff] = ZZX(0, 1);
// "building" the linearized-polynomial coefficients
vector<ZZX> C(d);
ea.buildLinPolyCoeffs(C, LM);
coeffs.push_back(ctxt);
applyLinPoly1(ea, coeffs[coeff], C, conj);
}
}