Verification: read |
Require ModelProperties.
Require AuxiliaryLemmas.
Section readIsSecure.
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Lemma ReadPSS:
(s,t:SFSstate; u:SUBJECT)
(SecureState s)->(TransFunc u s Read t)->(SecureState t).
OpDontChangeStPSS.
Qed.
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Lemma ReadPSP:
(s,t:SFSstate; u:SUBJECT)
(StarProperty s)->(TransFunc u s Read t)->(StarProperty t).
OpDontChangeStPSP.
Qed.
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Lemma ReadPCP:
(s,t:SFSstate)(PreservesControlProp s Read t).
Intros; Unfold PreservesControlProp; Intros Sub TF; Inversion TF;
Unfold ControlProperty.
Split.
Intros.
Split.
Intro.
Absurd (DACCtrlAttrHaveChanged t t o0); Auto.
Intro; Absurd (MACObjCtrlAttrHaveChanged t t o0); Auto.
Intros; Absurd (MACSubCtrlAttrHaveChanged t t u0); Auto.
Qed.
End readIsSecure.
Hints Resolve ReadPSS ReadPSP ReadPCP.