void refresh_blinds(int8_t flags[], DB_t standard_basis_vector[], DB_t finalCW, bool party, size_t db_nitems, size_t rotate_by = 0) { DB_t tmp = 0; for(size_t j = 0; j < db_nitems; ++j) { tmp = (flags[(j + rotate_by) % db_nitems] != 0) ? finalCW : 0; // if(flags[(j + rotate_by) % db_nitems] != 0) // { // tmp = finalCW; // } // else // { // tmp = 0; // } if(party) updated_blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] - tmp; if(!party) updated_blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] + tmp; } } // void get_refresh_correction_words (tcp::socket& sb, DB_t one_shareA, DB_t one_shareB, DB_t one_shareC, DB_t& CW0, DB_t& CW1, DB_t& CW2, DB_t value) // { // DB_t tmp0 = value + one_shareA; // write(sb, boost::asio::buffer(&tmp0, sizeof(tmp0))); // read(sb, boost::asio::buffer(&CW0, sizeof(CW0))); // CW0 = CW0 + tmp0; // DB_t tmp1 = value + one_shareB; // write(sb, boost::asio::buffer(&tmp1, sizeof(tmp1))); // read(sb, boost::asio::buffer(&CW1, sizeof(CW1))); // CW1 = CW1 + tmp1; // DB_t tmp2 = value + one_shareC; // write(sb, boost::asio::buffer(&tmp2, sizeof(tmp2))); // read(sb, boost::asio::buffer(&CW2, sizeof(CW2))); // CW2 = CW2 + tmp2; // } void refresh_blinded_vector(int8_t flags0[], int8_t flags2[], DB_t b[], DB_t d[], DB_t finalCW0, DB_t finalCW2, bool party, size_t db_nitems, size_t rotate_by = 0) { DB_t tmp0 = 0; DB_t tmp2 = 0; for(size_t j = 0; j < db_nitems; ++j) { tmp0 = (flags0[(j + rotate_by) % db_nitems] != 0) ? finalCW0 : 0; tmp2 = (flags2[(j + rotate_by) % db_nitems] != 0) ? finalCW2 : 0; // if(flags0[(j + rotate_by) % db_nitems] != 0) // { // tmp0 = finalCW0; // } // else // { // tmp0 = 0; // } // if(flags2[(j + rotate_by) % db_nitems] != 0) // { // tmp2 = finalCW2; // } // else // { // tmp2 = 0; // } if(party) { updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] - tmp0 + tmp2; } if(!party) { updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] + tmp0 - tmp2; } } } void refresh_blinded_vector_and_blinds(int8_t flags[], DB_t standard_basis_vector[], DB_t finalCW,int8_t flags0[], int8_t flags2[], DB_t b[], DB_t d[], bool party, size_t db_nitems, size_t rotate_by) { for(size_t j = 0; j < db_nitems; ++j) { updated_blinded_DB_recv[j] = blinded_DB_recv[j] - b[(j + rotate_by) % db_nitems] + d[(j + rotate_by) % db_nitems] - (flags0[(j + rotate_by) % db_nitems] * finalCW) + (flags2[(j + rotate_by) % db_nitems] * finalCW); blinds[j] = blinds[j] - standard_basis_vector[(j + rotate_by) % db_nitems] - (flags[(j + rotate_by) % db_nitems] * finalCW); } } void duoram_refresh (int8_t flags0[], int8_t flags1[], int8_t flags2[], DB_t b[], DB_t c[], DB_t d[], DB_t CW, bool party, size_t db_nitems, size_t rotate_by_ = 0) { refresh_blinded_vector_and_blinds(flags1, c, CW, flags0, flags2, b, d, party, db_nitems, rotate_by_); }