57 lines
841 B
Plaintext
57 lines
841 B
Plaintext
/*
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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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secret k : Function;
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const kee: Sessionkey;
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protocol yahalompaulson(I,R,S)
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{
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role I
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{
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fresh 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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recv_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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claim_10(I, Niagree);
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}
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role R
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{
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fresh nr: Nonce;
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var ni: Nonce;
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var kir: Sessionkey;
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recv_1(I,R, I,ni);
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send_2(R,S, R,nr,{I,ni}k(R,S) );
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recv_4(I,R, {I,R,kir,nr}k(R,S), {nr}kir );
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claim_11(R, Secret,kir);
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claim_12(R, Nisynch);
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claim_13(R, Niagree);
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}
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role S
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{
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fresh kir: Sessionkey;
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var ni,nr: Nonce;
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recv_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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