64 lines
1.0 KiB
Plaintext
64 lines
1.0 KiB
Plaintext
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/*
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* Yahalom Paulson-strengthened
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* As in Sjouke's list
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*/
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usertype Sessionkey, Ticket;
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const Alice,Bob,Simon,Eve : Agent;
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secret k : Function;
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untrusted Eve;
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compromised k(Eve,Simon);
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const ne: Nonce;
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const kee: Sessionkey;
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protocol yahalomlowe(I,R,S)
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{
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role I
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{
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const ni: Nonce;
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var nr: Nonce;
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var kir: Sessionkey;
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var T: Ticket;
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send_1(I,R, I,ni);
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read_3(S,I, nr, {R,kir,ni}k(I,S), T );
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send_4(I,R, T, {nr}kir );
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claim_8(I, Secret,kir);
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claim_9(I, Nisynch);
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}
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role R
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{
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const nr: Nonce;
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var ni: Nonce;
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var kir: Sessionkey;
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read_1(I,R, I,ni);
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send_2(R,S, R,nr,{I,ni}k(R,S) );
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read_4(I,R, {I,R,kir,nr}k(R,S), {nr}kir );
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claim_10(R, Secret,kir);
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claim_11(R, Nisynch);
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}
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role S
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{
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const kir: Sessionkey;
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var ni,nr: Nonce;
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read_2(R,S, R,nr, {I,ni}k(R,S) );
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send_3(S,I, nr, { R,kir,ni }k(I,S), {I,R,kir,nr}k(R,S) );
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}
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}
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run yahalomlowe.I(Agent,Agent,Simon);
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run yahalomlowe.R(Agent,Agent,Simon);
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run yahalomlowe.S(Agent,Agent,Simon);
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run yahalomlowe.I(Agent,Agent,Simon);
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run yahalomlowe.R(Agent,Agent,Simon);
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