Question

Alice wants to sign a long message M to Bob. Which one of the following is sent by Alice to Bob. Let Apk: Alice's public key Apr: Alice's private key Bpk: Bob's pu nonrepudiation. You selected this answer. Bpr: Bob's private key ECM,K): Encryption the message M with the key K DCM,K): Decryption the message M with the key K HCM): Hash value of M Z(M): Compressed value (maximum 10 percent of the original message) (Select all that apply.) a. A->B:H(E(M,Apk)),M b. A->B: E(E(M,Apr), Bpk) c. A->B: Z(E(M,Apr), Bpk) d. A->B: E(H(M),Apr),M. e. A->B: H(E(M,Apr)),M f. A->B: E(H(M),Apk),M e. A->B: E(Z(M),Apk),M

Answer 1

none of the above options are true.

Step-by-step explanation:

option with M at the end are exluded beacuse M is message and it cannot be send openly so option a,d,e,f,g cannot be options

the option b and c includes with Alice private key Apr which alice cannot send to any individual so these options are also excluded