scyther/protocols/misc/bke.spdl
2012-06-12 23:12:14 +02:00

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/*
Bilateral Key Exchange with Public Key protocol (BKEPK)
*/
usertype Key;
hashfunction hash;
protocol bke(I,R)
{
role I
{
fresh ni: Nonce;
var nr: Nonce;
var kir: Key;
send_1 (I,R, { ni,I }pk(R) );
recv_2 (R,I, { hash(ni),nr,R,kir }pk(I) );
send_3 (I,R, { hash(nr) }kir );
claim_4 (I, Secret, kir );
claim_5 (I, Niagree );
claim_6 (I, Nisynch );
}
role R
{
var ni: Nonce;
fresh nr: Nonce;
fresh kir: Key;
recv_1 (I,R, { ni,I }pk(R) );
send_2 (R,I, { hash(ni),nr,R,kir }pk(I) );
recv_3 (I,R, { hash(nr) }kir );
claim_7 (R, Secret, kir );
claim_8 (R, Niagree );
claim_9 (R, Nisynch );
}
}
untrusted e;
compromised sk(e);