scyther/gui/Protocols/ISO-9798/isoiec-9798-4-3-udkey.spdl

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2012-11-15 11:10:06 +00:00
/*
* Modeled from ISO/IEC 9798
* Modeler: Cas Cremers, Dec. 2010
*
* ccf
* two-pass
* mutual
*
* Unidirectional key version.
*
* Modeling notes:
*
* - The keyed CCF (f_kab(x)) is modeled as f(x,kab)
*/
hashfunction f;
protocol isoiec-9798-4-3-udkey(A,B)
{
role A
{
fresh Text1,Text2: Ticket;
var Text3,Text4: Ticket;
fresh TNa: Nonce;
var TNb: Nonce;
claim(A,Running,B,TNa,Text1);
send_1(A,B, TNa, Text2, f(TNa,Text1, k(A,B) ) );
recv_2(B,A, TNb, Text4, f(TNb,Text3, k(B,A) ) );
claim(A,Commit,B,TNb,Text3);
claim(A,Alive);
claim(A,Weakagree);
}
role B
{
var TNa: Nonce;
fresh TNb: Nonce;
var Text1,Text2: Ticket;
fresh Text3,Text4: Ticket;
recv_1(A,B, TNa, Text2, f(TNa,Text1, k(A,B) ) );
claim(B,Running,A,TNb,Text3);
send_2(B,A, TNb, Text4, f(TNb,Text3, k(B,A) ) );
claim(B,Commit,A,TNa,Text1);
claim(B,Alive);
claim(B,Weakagree);
}
}