51 lines
919 B
Plaintext
51 lines
919 B
Plaintext
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// 12/05/06
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// S. Mauw
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// Modeling of Identity Based Encryption primitive.
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const pk: Function;
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secret sk: Function;
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const ibepublic: Function;
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secret ibesecret: Function;
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const param: Function;
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inversekeys (pk,sk);
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inversekeys (ibepublic,ibesecret);
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protocol ibe(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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read_1(S,I, param(S) );
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send_3(I,R, {ni}ibepublic(param(S),R) );
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claim_i1(I,Secret,ni);
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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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read_2(S,R, {ibesecret(param(S),R)}pk(R) );
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read_3(I,R, {ni}ibepublic(param(S),R) );
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claim_r1(R,Secret,ni);
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//of course this claim is invalid
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}
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role S
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{
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send_1(S,I, param(S) );
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send_2(S,R, {ibesecret(param(S),R)}pk(R) );
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}
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}
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const Alice, Bob, Carol, Eve: Agent;
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untrusted Eve;
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const ne: Nonce;
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compromised sk(Eve);
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compromised ibesecret(param(Eve),Alice);
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compromised ibesecret(param(Eve),Bob);
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compromised ibesecret(param(Eve),Carol);
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