Math and Cryptography Quiz

Encrypt the word STUFF using an alphabetic Caesar shift cipher that starts with shift 8 (mapping A to I), and shifts one additional space after each character is encrypted.

Encrypt the word SOUND using an alphabetic Caesar shift cipher that starts with shift 4 (mapping A to E), and shifts one additional space after each character is encrypted.

Decrypt the word RNLLF if it was encrypted using an alphabetic Caesar shift cipher that starts with shift 21 (mapping A to V), and shifts one additional space after each character is encrypted.

Compute: 66 Mod 4

• 2

• 1

• 4

Tags

CCSS.6.NS.B.2

Compute: 232 mod 26

• 25

• 24

• 23

Tags

CCSS.3.OA.B.6

Compute: 72 mod 7

• 3

• 4

• 2

Tags

CCSS.6.NS.B.3

Compute: 415 mod 31

• 12

• 10

• 14

Tags

CCSS.6.NS.B.2

Use the modular exponent rule to calculate 138^5 mod 4

• 2

• 0

• 1

You are doing a Diffie-Hellman-Merkle key exchange with Maximiliano using generator 2 and prime 19. You pick the secret number 9. What value will you send to Maximiliano?

• 20

• 18

• 19

Tags

CCSS.HSF-BF.B.4A

You are doing a Diffie-Hellman-Merkle key exchange with Marissa using generator 2 and prime 19. Your secret number is 2. Marissa sends you the value 5. Determine the shared secret key.

• 7

• 5

• 6