Question 27 2 Points Old Buddies Alice Bob Sending Messages Alice Receives Message 106 Bo Q26109509

Question 27 (2 points)

Question 27 Unsaved

Our old buddies Alice and Bob are sending messages again. Alicereceives the message 106 from Bob, knowing n = 32283 and a = 137.Bob knows b = 233. Bob had 15716 to send. What is the correctmethod that Bob used to determine the message to send to Alice?

Question 27 options:

(15716)^137 mod 32283

(15716)^233 mod 32283

(15716)^32283 mod 233

(15716)^32283 mod 233

(15716)^233 mod 137

Save

Question 28 (2 points)

Question 28 Unsaved

Alice sends the encrypted message 168 to Bob. N=221 and a = 11.Bob knows b = 35. Using fast modular exponentiation, find themessage.

This is an Extra Credit problem and optional. You can do well onthe exam and skip this if you choose to do so.

Question 28 options:

76

155

340

308

77

Save

Question 29 (2 points)

Question 29 Unsaved

Alice sends Bob an encrypted message using the RSA encryptionmethod.

The RSA encryption method is based on two functions.

Given P = plaintext, and C = ciphertext, the two functionsare:

P = C ^ G (mod N)

C = P ^ H (mod N)

What is G?

Question 29 options:

Bob’s private key

Alice’s private key

Bob’s public key

Alice’s public key

Save

Question 30 (2 points)

Question 30 Unsaved

Alice sends Bob an encrypted message using the RSA encryptionmethod.

The RSA encryption method is based on two functions.

Given P = plaintext, and C = ciphertext, the two functionsare:

P = C ^ G (mod N)

C = P ^ H (mod N)

What is H?

Question 30 options:

Alice’s public key

Bob’s private key

Bob’s public key

Alice’s private key

Save

Question 31 (2 points)

Question 31 Unsaved

Which two the following are likely the prime reasons thestandard “Waterfall” model of system development has failed sooften?

Question 31 options:

mobility and scale

requirements and time to deliver

stakeholders and management

complexity and inherent difficulty

planning and scheduling

0 replies

Leave a Reply

Want to join the discussion?
Feel free to contribute!

Leave a Reply

Your email address will not be published. Required fields are marked *