Digital signatures and key management are the two most important applications of __________ encryption.Group of answer choicesadvancedpublic-keyprivate-keypreimage resistant

Which of the following elements of cryptography assures the trustworthiness of data and resources in terms of preventing improper and unauthorized changes?Group of answer choicesNonrepudiationIntegrityConfidentialityAuthentication

Which security mechanism is used to ensure the integrity and authenticity of data in IoT communications? Group of answer choicesPublic key infrastructure (PKI)Two-factor authenticationData encryptionDigital signatures

Which of the following is key mechanism for protecting data?(1 Point)AuthenticationAccess controlAll of the aboveAuditing

Digital certificates are used for what purposes? (Select two.)1 pointHashingSymmetric EncryptionAsymmetric EncryptionIdentification

The consortium are interested in implementing signatures into the crypto-system. The goal is to provide an authentication mechanism which allows a recipient to see from whom the message originated. The consortium leader considers several options for how to implement this mechanism. State whether or not each option is secure, and provide a justification. Suppose Aldebaran wishes to send a message to Borealis, and Aldebaran possesses a signing keypair (sk′A, pk′A). (Hint: think about what eavesdroppers can learn about the identities of senders)(Sign-then-Double-Encrypt) Aldebaran computes σ = Sign(sk′ A, m), andcσ = Enc(pkC, Enc(pkB, σ)). Aldebaran sends cσ along with their usual broadcast, (pkC, cdest, cmsg). Chandra performs her usual steps, as well as decrypting to obtain c′σ = Dec(skC, cσ). She sends it along with her usual broadcast, (pkB, c′msg) for Borealis. Lastly, Borealis, who will receives the message m, now also obtains σ =Dec(skB, c′σ). Borealis believes the message should have come from Aldebaran. He runs Verify(pk′A, m, σ) and is satisfied only if the signature accepts.