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CowGear, more protocols with replicated secret sharing.

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This commit is contained in:
Marcel Keller
2019-06-07 15:26:03 +10:00
parent 6ab8d85912
commit 715f67f4c5
285 changed files with 4033 additions and 1731 deletions
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18
FHE/FHE_Keys.cpp
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@@ -1,6 +1,9 @@
#include "FHE_Keys.h"
#include "Ciphertext.h"
#include "P2Data.h"
#include "PPData.h"
#include "FFT_Data.h"
#include "FHEOffline/FullSetup.h"
@@ -52,8 +55,10 @@ void FHE_PK::KeyGen(Rq_Element& sk, PRNG& G, int noise_boost)
mul(e0,e0,PK.pr);
add(PK.b0,PK.b0,e0);
#ifdef CHECK_NOISE
// strict check not working for GF(2^n)
PK.check_noise(PK.b0 - PK.a0 * sk, false);
#endif
if (params->n_mults() > 0)
{
@@ -88,7 +93,7 @@ void FHE_PK::check_noise(const FHE_SK& SK)
void FHE_PK::check_noise(const Rq_Element& x, bool check_modulo)
{
assert(pr != 0);
vector<bigint> noise = x.to_vec_bigint();
bigint m = 0;
if (check_modulo)
@@ -104,10 +109,11 @@ void FHE_PK::check_noise(const Rq_Element& x, bool check_modulo)
noise[i] /= pr;
m = m > noise[i] ? m : noise[i];
}
cout << "max noise: " << m << endl;
cerr << "max noise: " << m << endl;
}
template<>
void FHE_PK::encrypt(Ciphertext& c,
const Plaintext<gfp,FFT_Data,bigint>& mess,const Random_Coins& rc) const
{
@@ -123,6 +129,7 @@ void FHE_PK::encrypt(Ciphertext& c,
template<>
void FHE_PK::encrypt(Ciphertext& c,
const Plaintext<gfp,PPData,bigint>& mess,const Random_Coins& rc) const
{
@@ -137,6 +144,7 @@ void FHE_PK::encrypt(Ciphertext& c,
template<>
void FHE_PK::encrypt(Ciphertext& c,
const Plaintext<gf2n_short,P2Data,int>& mess,const Random_Coins& rc) const
{
@@ -205,6 +213,7 @@ Ciphertext FHE_PK::encrypt(
}
template<>
void FHE_SK::decrypt(Plaintext<gfp,FFT_Data,bigint>& mess,const Ciphertext& c) const
{
if (&c.get_params()!=params) { throw params_mismatch(); }
@@ -220,6 +229,7 @@ void FHE_SK::decrypt(Plaintext<gfp,FFT_Data,bigint>& mess,const Ciphertext& c) c
template<>
void FHE_SK::decrypt(Plaintext<gfp,PPData,bigint>& mess,const Ciphertext& c) const
{
if (&c.get_params()!=params) { throw params_mismatch(); }
@@ -234,6 +244,7 @@ void FHE_SK::decrypt(Plaintext<gfp,PPData,bigint>& mess,const Ciphertext& c) con
template<>
void FHE_SK::decrypt(Plaintext<gf2n_short,P2Data,int>& mess,const Ciphertext& c) const
{
if (&c.get_params()!=params) { throw params_mismatch(); }
@@ -243,7 +254,8 @@ void FHE_SK::decrypt(Plaintext<gf2n_short,P2Data,int>& mess,const Ciphertext& c)
mul(ans,c.c1(),sk);
sub(ans,c.c0(),ans);
mess.set_poly_mod(ans.to_vec_bigint(),ans.get_modulus());
ans.change_rep(polynomial);
mess.set_poly_mod(ans.get_iterator(), ans.get_modulus());
}