https://github.com/EasyCrypt/easycrypt
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Tip revision: 1e6d420bd53a6b8d0c563c9c35ab0aa266daff04 authored by Cameron Low on 04 September 2023, 15:38:51 UTC
No argument proc typing
No argument proc typing
Tip revision: 1e6d420
CCA1.eca
require import Bool Core.
require (*--*) DBool NewSKE.
clone include NewSKE.
module type CCA1 = {
proc enc(p: plain): cipher option
proc dec(c: cipher): plain option
}.
module type Adv_CCA1 (O : CCA1) = {
proc choose(): plain * plain
proc guess(c: cipher): bool { O.enc }
}.
module IND_CCA1 ( S : SKE, A : Adv_CCA1) = {
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';
}
}.