0f54f2ed23
SPORE:
- pk is not known to all agents, only pk(Simon) is known
- Use new naming convention:
- Protocol name starting with an @ means internal protocol
- For non internal protocols naming is as follows:
protocolname-variant^subprotocol
For example: yahalom-Lowe^KeyCompromise meaning the key compromise sub
protocol of the Lowe variant of the Yahalom protocol.
92 lines
1.8 KiB
Plaintext
92 lines
1.8 KiB
Plaintext
# TMN
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#
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# Modelled after the description in the SPORE library
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# http://www.lsv.ens-cachan.fr/spore/tmn.html
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#
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# Note:
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# According to Boyd and Mathuria Kb is the session key this is not clear
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# from the description in SPORE
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usertype SessionKey;
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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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const Fresh: Function;
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const Compromised: Function;
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protocol tmn^KeyCompromise(C)
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{
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// Read the names of 3 agents and disclose a session between them including
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// corresponding session key to simulate key compromise
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role C {
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const Ni,Nr: Nonce;
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const Kr,Ki: SessionKey;
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var I,R,S: Agent;
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read_C1(C,C, I,R,S);
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send_C2(C,C, R,{Ki}pk(S),
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I, {Kr}pk(S),
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{Kr}Ki,
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Kr
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);
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claim_C3(C,Empty, (Compromised,Kr));
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}
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}
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protocol tmn(I,R,S)
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{
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role I
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{
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const Ki: SessionKey;
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var Kr: SessionKey;
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send_1(I,S, R,{Ki}pk(S) );
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read_4(S,I, R,{Kr}Ki );
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claim_I1(I,Secret,Kr);
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claim_I2(I,Nisynch);
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claim_I3(I,Empty,(Fresh,Kr));
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}
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role R
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{
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const Kr: SessionKey;
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read_2(S,R, I );
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send_3(R,S, I, { Kr }pk(S) );
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claim_R1(R,Secret,Kr);
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claim_R2(R,Nisynch);
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claim_R3(R,Empty,(Fresh,Kr));
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}
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role S
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{
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var Ki,Kr: SessionKey;
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read_1(I,S, R,{Ki}pk(S) );
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send_2(S,R, I );
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read_3(R,S, I, { Kr }pk(S) );
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send_4(S,I, R,{Kr}Ki );
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}
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}
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const Alice,Bob,Eve,Simon: Agent;
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const Ke: SessionKey;
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untrusted Eve;
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compromised sk(Eve);
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# Scenario to recreate an attack in SPORE
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#run tmn.I (Alice,Bob,Simon);
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#run tmn.R (Alice,Bob,Simon);
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#run tmn.S (Alice,Bob,Simon);
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run tmn.I (Agent,Agent,Simon);
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run tmn.R (Agent,Agent,Simon);
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run tmn.S (Agent,Agent,Simon);
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