Alice wants to sign and then send a confidential letter 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 public key

Bpr: Bob's private key

E (M, K) : Encryption the message M with the key K

D (M, K) : Decryption the message M with the key

K H (M) : Hash value of M

(Select all that apply.)

1. A->B: E (H (M, Apk))

2. A->B: E (H (M), Bpr)

3. A->B: E (E (M, Apk), Bpk)

4. A->B: E_Apk (E_Bpr (M))

5. A->B: ED (M, Apr), Bpk)

6. A->B: E (E (M, Apr), Bpk)

7. A->B: D (E (M, Apr), Bpk)

8. A->B: E (E (M, Apr), Bpr)

9. A->B: E (H (M), Bpk)

Question

Aubrey Davies

Computers & Technology

29 June, 00:28

Alice wants to sign and then send a confidential letter 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 public key

Bpr: Bob's private key

E (M, K) : Encryption the message M with the key K

D (M, K) : Decryption the message M with the key

K H (M) : Hash value of M

(Select all that apply.)

1. A->B: E (H (M, Apk))

2. A->B: E (H (M), Bpr)

3. A->B: E (E (M, Apk), Bpk)

4. A->B: E_Apk (E_Bpr (M))

5. A->B: ED (M, Apr), Bpk)

6. A->B: E (E (M, Apr), Bpk)

7. A->B: D (E (M, Apr), Bpk)

8. A->B: E (E (M, Apr), Bpr)

9. A->B: E (H (M), Bpk)

+2

Answers (1)

Know the Answer?

Rylee Richmond · Answer 1

9

Explanation:

First step includes with hashing of confidential message H (M) then Alice will encrypt the hashed message with bobs public key E (H (M), Bpk) as it is available openly to send message to Bob

so 9th option clearly defines the complete procedure.