scyther/protocols/misc/f4.spdl

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/*
* f4.spdl
*
* Tailored protocol to show that any number of runs can be required to
* find an attack.
*
* For this version, -m2 and -r4 are needed.
*
* April 2005, Cas Cremers
*/
const pk: Function;
secret sk: Function;
inversekeys (pk,sk);
protocol f4(I,R)
{
role I
{
var nr: Nonce;
read_!1(R,I, nr );
send_!2(I,R, { nr }sk(I) );
read_!3(R,I, {{{{ nr }sk(R)}sk(R)}sk(R)}sk(R) );
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claim_i1(I,Reachable);
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}
role R
{
const nr: Nonce;
send_!1(R,I, nr );
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}
}
const Alice,Bob,Eve: Agent;
untrusted Eve;
const ne: Nonce;
compromised sk(Eve);