|
|
@@ -178,10 +178,23 @@ using MultTriple = std::tuple<value_t, value_t, value_t>;
|
|
|
|
|
|
using HalfTriple = std::tuple<value_t, value_t>;
|
|
|
|
|
|
-// The type of nodes in a DPF
|
|
|
+// The type of nodes in a DPF. This must be at least as many bits as
|
|
|
+// the security parameter, and at least twice as many bits as value_t.
|
|
|
|
|
|
using DPFnode = __m128i;
|
|
|
|
|
|
+// An AND triple is a triple of (X0,Y0,Z0) of DPFnodes held by P0 (and
|
|
|
+// correspondingly (X1,Y1,Z1) held by P1), with all values random, but
|
|
|
+// subject to the relation that (X0&Y1) ^ (Y0&X1) = Z0^Z1. These are
|
|
|
+// only used while creating RDPFs in the preprocessing phase, so we
|
|
|
+// never need to store them.
|
|
|
+
|
|
|
+// You can't put __m128i types directly into a tuple because of
|
|
|
+// alignment attributes, but you can put them in a structure.
|
|
|
+struct AndTriple {
|
|
|
+ DPFnode X, Y, Z;
|
|
|
+};
|
|
|
+
|
|
|
struct RDPF {
|
|
|
DPFnode seed;
|
|
|
};
|
