Bob wants to sign his message to Mary so that she knows it is actually Bob who is the originator and not someone else. What is the correct way that he should do it?ABob uses Mary's public key to encrypt so the Mary can use her private key to decrypt the signatureBBob uses Mary's private key to encrypt so the Mary can use her public key to decrypt the signatureCBob uses his private key to encrypt so the Mary can use Bob's public key to decrypt the signatureDBob uses his public key to encrypt so the Mary can use Bob's private key to decrypt the signature

Bob wants to encrypt his message to Mary for secrecy. What is the correct way that he should do it?ABob uses Mary's public key to encrypt so the Mary can use her private key to decrypt the messageBBob uses Mary's private key to encrypt so the Mary can use her public key to decrypt the messageCBob uses his private key to encrypt so the Mary can use Bob's public key to decrypt the messageDBob uses his public key to encrypt so the Mary can use Bob's private key to decrypt the message

Alice and Bob are using a digital signature to sign a document. What key should Alice use to sign the document so that Bob can make sure that the document came from Alice?Question 6Select one:username and password from Aliceprivate key from Bobpublic key from Bobprivate key from Alice

By using asymmetric cryptography, what does Bob have to do to send a secret message to Alice? Bob must encrypt the message with his public key and Alice will decrypt with Bob’s private keyBob must encrypt the message with his private key and Alice decrypts it with Bob’s public key.Bob must encrypt the message with Alice’s private key and Alice decrypts it with her public key.Bob must encrypt the message with Alice’s public key and Alice decrypts it with her own private key.

Alice and Bob use a pre-shared key to exchange a confidential message. If Bob wants to send a confidential message to Carol, what key should he use?Question 29Select one:the private key of Carola new pre-shared keythe same pre-shared key he used with Alicethe public key of Bob

Alice and Bob would like to use an asymmetric cryptosystem to communicate with each other.  They are located in different parts of the country but have exchanged encryption keys by using digital certificates signed by a mutually trusted certificate authority. When Bob receives an encrypted message from Alice, what key does he use to decrypt the plaintext message’s contents?Alice’s public KeyAlice’s private keyBob’s public keyBob’s private key