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Submitted on 28 Jun 20 21:20 UTC. attacker[active] principal Alice[ knows private a generates na ga = G^a ] principal Bob[ knows private b generates nb gb = G^b ] Alice -> Bob: [ga] Bob -> Alice: gb principal Alice[ e1 = PKE_ENC(gb, na) ] Alice -> Bob: e1 principal Bob[ na_bob = PKE_DEC(b, e1) e2 = PKE_ENC(ga, CONCAT(na_bob, nb)) ] Bob -> Alice: e2 principal Alice[ m2 = PKE_DEC(a, e2) na_bob_alice, nb_alice = SPLIT(m2) _ = ASSERT(na, na_bob_alice)? e3 = PKE_ENC(gb, nb_alice) ] Alice -> Bob: [e3] principal Bob[ nb_alice_bob = PKE_DEC(b, e3) _ = ASSERT(nb, nb_alice_bob)? ] queries[ authentication? Alice -> Bob: e1 authentication? Bob -> Alice: e2 confidentiality? na confidentiality? nb ]
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Title:needham-schroeder-pk.vp Note over Alice: knows private a\n generates na\n ga = G^a\n Note over Bob: knows private b\n generates nb\n gb = G^b\n Alice -> Bob: [ga] Bob -> Alice: gb Note over Alice: e1 = PKE_ENC(gb, na)\n Alice -> Bob: e1 Note over Bob: na_bob = PKE_DEC(b, e1)\n e2 = PKE_ENC(ga, CONCAT(na_bob, nb))\n Bob -> Alice: e2 Note over Alice: m2 = PKE_DEC(a, e2)\n na_bob_alice, nb_alice = SPLIT(m2)\n _ = ASSERT(na, na_bob_alice)?\n e3 = PKE_ENC(gb, nb_alice)\n Alice -> Bob: [e3] Note over Bob: nb_alice_bob = PKE_DEC(b, e3)\n _ = ASSERT(nb, nb_alice_bob)?\n

Analysis Results

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