1.7 KiB
1.7 KiB
Multiparty & 3-server
Two-party keys are the default. The library also builds three-evaluator
(2,3) keys, information-theoretic three-server DPFs, and dealer-free
two-party keygen when the index is already shared.
| Construction | Parties | Header |
|---|---|---|
| [dpf::make_dpf3](@ref dpf/dpf3.hpp) | Any two of three open (Shamir / dual spine, [ePrint 2024/1658](@ref bib_dpf3)) | dpf3.hpp |
| [dpf::make_dpf3_doerner_shelat](@ref dpf/dpf3_ds.hpp) | Same keys from XOR shares of alpha |
dpf3_ds.hpp |
make_dpf3_cmp / make_dpf3_ic / make_multipoint3 |
Comparisons, intervals, multipoint | dpf3_cmp.hpp, dpf3_multipoint.hpp |
| [dpf::make_it_dpf3](@ref dpf/it_dpf3.hpp) | Information-theoretic 3-server DPF ([ePrint 2023/028](@ref bib_itdpf)) | it_dpf3.hpp |
| [dpf::make_dpf_doerner_shelat](@ref dpf/doerner_shelat.hpp) | Two parties, shared index, no dealer for the point | doerner_shelat.hpp |
| [dpf::geneval_*](@ref dpf/geneval.hpp) | Answer shares for one query, no reusable key | geneval.hpp |
auto [k1, k2, k3] = dpf::make_dpf3(std::uint8_t{42}, dpf::fp61{7});
auto opened = dpf::reconstruct(
dpf::as_share(k1, dpf::eval_point(k1, std::uint8_t{42})),
dpf::as_share(k2, dpf::eval_point(k2, std::uint8_t{42})),
dpf::as_share(k3, dpf::eval_point(k3, std::uint8_t{42})));
Party meshes and socket walks live under [trio.hpp](@ref dpf/net/trio.hpp)
and the party/ harnesses. Application-shaped sketches include
[3-party Duoram](@ref app_duoram) and [three-server PIR](@ref app_pir3).
Go deeper: [guided tour — three evaluators](@ref tour_dpf3), [Doerner–Shelat](@ref tour_ds), [evaluating DPFs](@ref evaluation), [bibliography](@ref bibliography).