53 lines
784 B
Plaintext
53 lines
784 B
Plaintext
/*
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* Needham-Schroeder protocol
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*/
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// PKI infrastructure
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const pk: Function;
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secret sk: Function;
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inversekeys (pk,sk);
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// The protocol description
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protocol ns3(I,R)
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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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send_1(I,R, {I,ni}pk(R) );
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recv_2(R,I, {ni,nr}pk(I) );
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send_3(I,R, {nr}pk(R) );
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claim_i1(I,Secret,ni);
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claim_i2(I,Secret,nr);
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claim_i3(I,Niagree);
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claim_i4(I,Nisynch);
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}
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role R
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{
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var ni: Nonce;
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fresh nr: Nonce;
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recv_1(I,R, {I,ni}pk(R) );
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send_2(R,I, {ni,nr}pk(I) );
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recv_3(I,R, {nr}pk(R) );
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claim_r1(R,Secret,ni);
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claim_r2(R,Secret,nr);
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claim_r3(R,Niagree);
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claim_r4(R,Nisynch);
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}
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}
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// The agents in the system
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// An untrusted agent, with leaked information
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// The runs (only needed for the modelchecker algorithm)
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