scyther/spdl/SPORE/woo-lam-pi-1.spdl
gijs 56c032f4a5 Update SPORE protocols to use new ticket mechanism:
- Use builtin Ticket type instead of user type
- Remove remark that -m2 matching is required as it no longer is
2005-06-02 12:41:24 +00:00

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# Woo and Lam Pi 1
#
# Modelled after the description in the SPORE library
# http://www.lsv.ens-cachan.fr/spore/wooLamPi1.html
#
# Note:
# This protocol uses a ticket so scyther will only be able to verify
# the protocol using the ARACHNE engine (-a)
#
secret k: Function;
protocol woolamPi1(I,R,S)
{
role I
{
var Nr: Nonce;
send_1(I,R, I);
read_2(R,I, Nr);
send_3(I,R, {I,R,Nr}k(I,S));
}
role R
{
const Nr: Nonce;
var T: Ticket;
read_1(I,R, I);
send_2(R,I, Nr);
read_3(I,R, T);
send_4(R,S, {I,R, T}k(R,S));
read_5(S,R, {I,R, Nr}k(R,S));
claim_R1(R,Nisynch);
}
role S
{
var Nr: Nonce;
read_4(R,S, {I,R, {I,R,Nr}k(I,S)}k(R,S));
send_5(S,R, {I,R,Nr}k(R,S));
}
}
const Alice,Bob,Eve,Simon: Agent;
const Te: Ticket;
const Ne: Nonce;
untrusted Eve;
compromised k(Eve,Simon);
run woolamPi1.I (Agent,Agent,Simon);
run woolamPi1.R (Agent,Agent,Simon);
run woolamPi1.S (Agent,Agent,Simon);