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rosenpass/analysis/crypto/kem.mpv
Karolin Varner 137cd5e85a add proverif analysis of Rosenpass, the protocol
The analysis was conducted as joint effort between @koraa and @blipp.

Co-authored-by: Benjamin Lipp <blipp@mailbox.org>
2023-02-23 20:46:22 +01:00

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#pragma once
#include "prelude/basic.mpv"
#include "prelude/bits.mpv"
#include "crypto/key.mpv"
#include "crypto/setup.mpv"
@module kem
type kem_sk.
type kem_pk.
fun kem_pub(kem_sk) : kem_pk.
fun kem_enc(kem_pk, key) : bits.
fun kem_dec(kem_sk, bits) : key
reduc forall sk:kem_sk, shk:key;
kem_dec(sk, kem_enc(kem_pub(sk), shk)) = shk.
fun kem_pk2b(kem_pk) : bits [typeConverter].
const kem_sk0:kem_sk.
letfun kem_pk0 = kem_pub(kem_sk0).
#if FULL_MODEL
fun kem_keyeq(bits, bits) : bool
reduc forall k:kem_pk, pt1:key, pt2:key;
kem_keyeq(kem_enc(k, pt1), kem_enc(k, pt2)) = true
otherwise forall k1:kem_pk, pt1:key, k2:kem_pk, pt2:key;
kem_keyeq(kem_enc(k1, pt1), kem_enc(k2, pt2)) = false.
#endif