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saltchannel.vp

Submitted on 29 Jun 20 10:53 UTC.

attacker[active]

principal Server[
	knows private s
	gs = G^s
]

principal Client[
	knows private c
	gc = G^c
	generates ec
	m1 = G^ec
]

Client -> Server: [m1]

principal Server[
	generates es
	m2 = G^es
	shared_s = m1^es
	m3a = AEAD_ENC(shared_s, gs, nil)
	m3b = AEAD_ENC(shared_s, SIGN(s, HASH(m1, m2)), nil)
]

Server -> Client: m2, m3a, m3b

principal Client[
	shared_c = m2^ec
	gs_dec = AEAD_DEC(shared_c, m3a, nil)
	m3b_dec = AEAD_DEC(shared_c, m3b, nil)
	valid_c = SIGNVERIF(gs_dec, HASH(m1, m2), m3b_dec)?
	m4a = AEAD_ENC(shared_c, gc, nil)
	knows private pt1
	req = AEAD_ENC(shared_c, pt1, nil)
]

Client -> Server: [m4a], [req]

queries[
	confidentiality? pt1
]

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Title:saltchannel.vp Note over Server: knows private s\n gs = G^s\n Note over Client: knows private c\n gc = G^c\n generates ec\n m1 = G^ec\n Client -> Server: [m1] Note over Server: generates es\n m2 = G^es\n shared_s = m1^es\n m3a = AEAD_ENC(shared_s, gs, nil)\n m3b = AEAD_ENC(shared_s, SIGN(s, HASH(m1, m2)), nil)\n Server -> Client: m2, m3a, m3b Note over Client: shared_c = m2^ec\n gs_dec = AEAD_DEC(shared_c, m3a, nil)\n m3b_dec = AEAD_DEC(shared_c, m3b, nil)\n valid_c = SIGNVERIF(gs_dec, HASH(m1, m2), m3b_dec)?\n m4a = AEAD_ENC(shared_c, gc, nil)\n knows private pt1\n req = AEAD_ENC(shared_c, pt1, nil)\n Client -> Server: [m4a], [req]

Analysis Results

The model submitter provided the following analysis results:

Query 1 (Confidentiality): FAIL

Please note that these results are not verified to be accurate. The model submitter may choose to provide false analysis results if they so desire. It is strongly recommended that you re-run the analysis of this model locally if you wish to verify the authenticity of the analysis results above.

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