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

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usertype Sessionkey;
usertype Ticket;
secret k: Function;
protocol kaochow(I,R,S)
{
role I
{
fresh ni: Nonce;
var nr: Nonce;
var kir: Sessionkey;
send_1 (I,S, I,R,ni);
recv_3 (R,I, {I,R,ni,kir}k(I,S), {ni}kir, nr );
send_4 (I,R, {nr}kir );
claim_5 (I, Nisynch);
claim_6 (I, Niagree);
claim_7 (I, Secret, kir);
}
role R
{
var ni: Nonce;
fresh nr: Nonce;
var kir: Sessionkey;
var T;
recv_2 (S,R, T, { I,R,ni,kir }k(R,S) );
send_3 (R,I, T, {ni}kir, nr );
recv_4 (I,R, {nr}kir );
claim_8 (R, Nisynch);
claim_9 (R, Niagree);
claim_10 (R, Secret, kir);
}
role S
{
var ni: Nonce;
fresh kir: Sessionkey;
recv_1 (I,S, I,R,ni);
send_2 (S,R, {I,R,ni,kir}k(I,S), { I,R,ni,kir }k(R,S) );
}
}
const te: Ticket;
const ke: Sessionkey;