scyther/protocols/misc/localclaims-seq1.spdl
2007-05-17 17:28:10 +02:00

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/*
* Breaker for localclaims protocol; sequential composition variant 1
*
* Starts out as NSL3; last message (label3) has added name to avoid
* confusion with the later messages.
*
* Added messages labeled with x1 and x2 to allow for breaking the other
* protocol.
*/
const pk: Function;
secret sk: Function;
inversekeys (pk,sk);
protocol lcbreakerS1(I,R)
{
role I
{
const ni,ni2: Nonce;
var nr: Nonce;
var x: Nonce;
send_1(I,R, {I,ni}pk(R) );
read_2(R,I, {ni,nr,R}pk(I) );
send_3(I,R, {nr,I}pk(R) );
read_x1(R,I, { x }pk(I) );
send_x2(I,R, { x }ni );
send_lc(I,R, {ni2}pk(R) );
claim_i0(I,Secret,ni2);
claim_i1(I,Secret,ni);
claim_i2(I,Secret,nr);
}
role R
{
var ni,ni2: Nonce;
const nr: Nonce;
const x: Nonce;
read_1(I,R, {I,ni}pk(R) );
send_2(R,I, {ni,nr,R}pk(I) );
read_3(I,R, {nr,I}pk(R) );
send_x1(R,I, { x }pk(I) );
read_x2(I,R, { x }ni );
read_lc(I,R, {ni2}pk(R) );
claim_r0(R,Secret,ni2);
claim_r1(R,Secret,ni);
claim_r2(R,Secret,nr);
}
}
const Eve: Agent;
untrusted Eve;
const ne: Nonce;
compromised sk(Eve);