| 50 | |
| 51 | template <class FD> |
| 52 | void PartSetup<FD>::fake(vector<FHE_SK>& sks, vector<T>& alphais, |
| 53 | int nplayers, bool distributed, bool check_security) |
| 54 | { |
| 55 | if (check_security) |
| 56 | insecure("global key generation"); |
| 57 | if (distributed) |
| 58 | cout << "Faking distributed key generation" << endl; |
| 59 | else |
| 60 | cout << "Faking key generation with extra noise" << endl; |
| 61 | PRNG G; |
| 62 | G.ReSeed(); |
| 63 | pk = FHE_PK(params, FieldD.get_prime()); |
| 64 | FHE_SK sk(params, FieldD.get_prime()); |
| 65 | calpha = Ciphertext(params); |
| 66 | sks.resize(nplayers, pk); |
| 67 | alphais.resize(nplayers); |
| 68 | |
| 69 | if (distributed) |
| 70 | DistKeyGen::fake(pk, sks, FieldD.get_prime(), nplayers); |
| 71 | else |
| 72 | { |
| 73 | Rq_Element sk = FHE_SK(pk).s(); |
| 74 | for (int i = 0; i < nplayers; i++) |
| 75 | { |
| 76 | Rq_Element ski = pk.sample_secret_key(G); |
| 77 | sks[i].assign(ski); |
| 78 | sk += ski; |
| 79 | } |
| 80 | pk.KeyGen(sk, G, nplayers); |
| 81 | } |
| 82 | |
| 83 | for (int i = 0; i < nplayers; i++) |
| 84 | { |
| 85 | Plaintext_<FD> m(FieldD); |
| 86 | m.randomize(G,Diagonal); |
| 87 | Ciphertext calphai = pk.encrypt(m); |
| 88 | calpha += calphai; |
| 89 | alphais[i] = m.element(0); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | template <class FD> |
| 94 | void PartSetup<FD>::fake(vector<PartSetup<FD> >& setups, int nplayers, |
no test coverage detected