Ryan Henry
0d22946a0e
Ship the TLS mesh, composer, Beaver/Yao/leaf MPC, prep/online paths, apps, and docs so the tree is pushable before elevating share_expr, security_mode, and prep resume. Co-authored-by: Cursor <cursoragent@cursor.com>
65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <iostream>
|
|
#include <vector>
|
|
|
|
#include "dpf.hpp"
|
|
#include "dpf/app_flow.hpp"
|
|
#include "dpf/app_plans.hpp"
|
|
|
|
// Splinter, the DPF query step (Wang, Yun, Goldwasser, Vaikuntanathan, and
|
|
// Zeldovich, NSDI 2017). Private queries on public data with two-server FSS.
|
|
// The client's private selector is a unit DPF at a secret attribute value.
|
|
// Each server dots that selector with a public aggregate column, so the
|
|
// answer is the SUM (or COUNT) for the private key without either server
|
|
// learning which key was asked.
|
|
//
|
|
// c++ -std=c++17 -march=native -I include -I thirdparty \
|
|
// examples/applications/splinter.cpp
|
|
|
|
int main()
|
|
{
|
|
constexpr std::size_t domain = 256; // attribute values
|
|
|
|
// Public data, pre-aggregated by attribute: group_sum[v] is the SUM of a
|
|
// value column over the rows whose attribute equals v.
|
|
std::vector<std::uint64_t> group_sum(domain);
|
|
std::vector<std::uint64_t> group_cnt(domain, 1);
|
|
for (std::size_t v = 0; v < domain; ++v)
|
|
group_sum[v] = (v * 37 + 11) % 1000;
|
|
|
|
constexpr std::uint8_t secret_key = 88; // the private WHERE value
|
|
|
|
// One selector key per server. reconstruct = the two servers' shares.
|
|
auto [k0, k1] = dpf::make_dpf(secret_key, std::uint64_t{1});
|
|
|
|
// SELECT SUM(value) WHERE attribute = secret_key.
|
|
const auto sum = dpf::reconstruct(
|
|
dpf::eval_full_inner_product(dpf::paired, k0, group_sum),
|
|
dpf::eval_full_inner_product(dpf::paired, k1, group_sum));
|
|
if (sum != group_sum[secret_key])
|
|
{
|
|
std::cerr << "splinter sum\n";
|
|
return 1;
|
|
}
|
|
|
|
// SELECT COUNT(*) WHERE attribute = secret_key is the same selector on an
|
|
// all-ones column.
|
|
const auto cnt = dpf::reconstruct(
|
|
dpf::eval_full_inner_product(dpf::paired, k0, group_cnt),
|
|
dpf::eval_full_inner_product(dpf::paired, k1, group_cnt));
|
|
if (cnt != 1)
|
|
{
|
|
std::cerr << "splinter count\n";
|
|
return 1;
|
|
}
|
|
|
|
{
|
|
if (int rc = dpf::app::run_measured("splinter",
|
|
dpf::protocol::fss_point_plan(0), 8))
|
|
return rc;
|
|
}
|
|
|
|
std::cout << sum << "\n";
|
|
return 0;
|
|
}
|