scyther/spdl/bke-one.spdl

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/*
Bilateral Key Exchange with Public Key protocol (bkeONE)
*/
usertype Key;
const pk,hash: Function;
secret sk,unhash: Function;
inversekeys (pk,sk);
inversekeys (hash,unhash);
protocol bkeONE(I,R)
{
role I
{
const ni: Nonce;
var nr: Nonce;
var kir: Key;
send_1 (I,R, { ni,I }pk(R) );
read_2 (R,I, { hash(ni),nr,R,kir }pk(I) );
send_3 (I,R, { hash(nr) }kir );
claim_4 (I, Secret, kir );
}
role R
{
var ni: Nonce;
const nr: Nonce;
const kir: Key;
read_1 (I,R, { ni,I }pk(R) );
send_2 (R,I, { hash(ni),nr,R,kir }pk(I) );
read_3 (I,R, { hash(nr) }kir );
claim_5 (R, Secret, kir );
}
}
const a,e: Agent;
untrusted e;
compromised sk(e);
const ne: Nonce;
run bkeONE.I(a,Agent);
run bkeONE.R(Agent,a);
run bkeONE.I(a,Agent);
run bkeONE.R(Agent,a);
run bkeONE.I(a,Agent);
run bkeONE.R(Agent,a);
run bkeONE.I(a,Agent);
run bkeONE.R(Agent,a);
run bkeONE.I(a,Agent);
run bkeONE.R(Agent,a);