55 lines
1.1 KiB
Plaintext
55 lines
1.1 KiB
Plaintext
# SmartRight view-only
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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/smartright_viewonly.html
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#
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# Note:
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# According to SPORE there are no known attacks on this protocol
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#
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# Note:
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# Scyther finds an attack because the value of VoR in te last message can
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# be replaced with an arbitrary value
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const hash: Function;
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secret unhash: Function;
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secret k: Function;
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inversekeys (hash,unhash);
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usertype SessionKey;
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usertype XorKey;
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const Vor: XorKey;
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protocol smartright(I,R)
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{
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role I
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{
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const VoKey: SessionKey;
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const VoR: XorKey;
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const CW;
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var VoRi: Nonce;
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send_1(I,R, {VoKey,{CW}VoR}k(I,R));
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read_2(R,I, VoRi);
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send_3(I,R, VoR, {{VoRi}hash}VoKey);
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}
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role R
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{
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var T: Ticket;
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var VoR: XorKey;
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var VoKey: SessionKey;
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const VoRi: Nonce;
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read_1(I,R, {VoKey,T}k(I,R));
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send_2(R,I, VoRi);
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read_3(I,R, VoR,{{VoRi}hash}VoKey);
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claim_R1(R,Nisynch);
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}
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}
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const Alice,Bob,Eve: Agent;
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untrusted Eve;
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const ne: Nonce;
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