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2. Authentication Requirements. Kind of attacks (threats) in the context of communications across a networkDisclosureTraffic analysisMasqueradeContent modificationSequence modificationTiming modificationRepudiationMeasures to deal with first two attacks: In the realm of message confidentiality, and are addressed with encryptionMeasures to deal with items 3 thru 6 Message authenticationMeasures to deal with items 7Digital signature.

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