https://github.com/EasyCrypt/easycrypt
Tip revision: 7b972a49426e4ddddcc2a4c9ad8ebc3f3dc61906 authored by Pierre-Yves Strub on 14 October 2019, 12:20:46 UTC
Merge branch '1.0' into deploy-better-int-red
Merge branch '1.0' into deploy-better-int-red
Tip revision: 7b972a4
CPA.eca
(* --------------------------------------------------------------------
* Copyright (c) - 2012--2016 - IMDEA Software Institute
* Copyright (c) - 2012--2018 - Inria
* Copyright (c) - 2012--2018 - Ecole Polytechnique
*
* Distributed under the terms of the CeCILL-B-V1 license
* -------------------------------------------------------------------- *)
require import Bool Core.
require (*--*) DBool NewSKE.
clone include NewSKE.
module type CPA = {
proc enc(p: plain): cipher option
}.
module type Adv_CPA (O : CPA) = {
proc choose(): plain * plain
proc guess(c: cipher): bool
}.
module IND_CPA ( S : SKE, A : Adv_CPA) = {
module O = Wrap(S)
module A = A(O)
proc main(): bool = {
var b, b', c, p0, p1, p;
O.init();
(p0,p1) = A.choose();
b = ${0,1};
p = b ? p1 : p0; (* FIXME: need to check whether plaintexts are both valid or both invalid *)
c = O.enc(p);
b' = A.guess(oget c);
return b = b';
}
}.