- Added a protocol from Boyd & Mathuria: protocols for authentication
and key establishment.
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spdl/gong-nonce.spdl
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68
spdl/gong-nonce.spdl
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usertype Sessionkey;
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usertype Keypart;
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secret k: Function;
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protocol gongnonce(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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const ki: Keypart;
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var kr: Keypart;
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send_1 (I,R, I,R,ni );
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read_3 (S,I, { S,I,R, kr, I, ni }k(I,S), nr);
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send_4 (I,S, { I,S,I, ki, R, nr }k(I,S) );
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claim_6 (I, Secret, ki,kr);
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claim_8 (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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const nr: Nonce;
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const kr: Keypart;
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var ki: Keypart;
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read_1 (I,R, I,R,ni );
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send_2 (R,S, I,R, nr, { R,S,R, kr, I,ni }k(R,S));
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read_5 (S,R, { S,R,I, ki, R, nr }k(R,S) );
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claim_7 (R, Secret, ki,kr);
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claim_9 (R, Nisynch);
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}
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role S
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{
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var ni,nr: Nonce;
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var ki,kr: Keypart;
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read_2 (R,S, I,R, nr, { R,S,R, kr, I,ni }k(R,S));
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send_3 (S,I, { S,I,R, kr, I, ni }k(I,S), nr);
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read_4 (I,S, { I,S,I, ki, R, nr }k(I,S) );
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send_5 (S,R, { S,R,I, ki, R, nr }k(R,S) );
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}
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}
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const Alice,Bob,Simon,Eve: Agent;
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untrusted Eve;
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const ne: Nonce;
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const kpe: Keypart;
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const ke: Sessionkey;
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compromised k(Eve,Eve);
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compromised k(Eve,Alice);
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compromised k(Eve,Bob);
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compromised k(Eve,Simon);
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compromised k(Alice,Eve);
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compromised k(Bob,Eve);
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compromised k(Simon,Eve);
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run gongnonce.I(Agent,Agent,Simon);
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run gongnonce.R(Agent,Agent,Simon);
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run gongnonce.S(Agent,Agent,Simon);
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run gongnonce.I(Agent,Agent,Simon);
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run gongnonce.R(Agent,Agent,Simon);
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run gongnonce.S(Agent,Agent,Simon);
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