scyther/protocols/misc/woolam-pi-f.spdl

/*
 * Woo-lam version from Spore, Pi f
 *
 * Only one-way verification version
 */

usertype Server, SessionKey, Ticket;
secret k: Function;

const Simon: Server;

const ke: SessionKey;

protocol woolampif(A,B,S)
{
	role A
	{
		var Nb: Nonce;

		send_1(A,B, A);
		read_2(B,A, Nb);
		send_3(A,B, { A,B,Nb }k(A,S) );
	}

	role B
	{
		fresh Nb: Nonce;
		var T: Ticket;

		read_1(A,B, A);
		send_2(B,A, Nb);
		read_3(A,B, T);
		send_4(B,S, { A,B,Nb, T }k(B,S) );
		read_5(S,B, { A,B,Nb }k(B,S) );

		claim_6(B,Niagree);
		claim_7(B,Nisynch);
	}

	role S
	{
		var Nb: Nonce;

		read_4(B,S, { A,B,Nb, { A,B,Nb }k(A,S) }k(B,S) );
		send_5(S,B, { A,B,Nb }k(B,S) );
	}
}