Help me please. This is all about math in digital communication cryptography math. I am not sure with RSA cryptography and the conceptual questions so i only got 13/14. Would u help me identify my wrong answer? And explain why?
Question 12 1 pts Suppose the RSA system that is used for sending secret messages has private key (15, 3) and the cipher text "3" is received. What was the plain text sent? 12 07 0 9 05 Question 13 1 pts Which of the following is FALSE? None of the Above For any integer b, we have b = b (mod n) O For any two integers a and b, if a = b (mod n), then b = a (mod n) O For any three integers a, b, and c,D Question 5 Which of the following refers to the property the sender and receiver are guaranteed that no third party can make any changes in the message that exchange in the transmission process? O Confidentiality O Authenticity O Non-repudiation Integrity Question 6 1 pts Which of value for x satisfies the equivalence relation: 3x = 1 (mod 14)? 5 0 3D Question 14 1 pts Which of the following refers to the property the sender and receiver are guaranteed that no third party can make any changes in the message that exchange in the transmission process? O Authenticity Integrity Non-repudiation O ConfidentialityQuestion 10 1 pts Who among these men introduced to us the public key cryptosystem? O Adleman O Shamir Diffie O RivestD Question 9 1 pts Suppose p = 5 and q = 11. Which of the following is the private key of an RSA cryptosystem with public key (n,e) = (55, 7)? O (55, 39) (55, 15) (55, 23) O None of the AboveSuppose the Caesar cipher is used to encrypt the message "QUICK." Which of the following cipher text corresponds to this plain text? O TLXFN O None of the Above TXLFN O TXLNF D Question 4 1 pts Which of the following refers to the property that a receiver of a message can prove to any third party that indeed the message s/he received came from the actual sender? O Integrity O Confidentiality O Authenticity Non-repudiationD Question 7 1 pts Suppose the Vigenere cipher is used to create the cipher text "DOYMTOD" using the keyword "ROSE." Which of the following is its corresponding plain text? O REASONS O SEASONS MAGICAL O LOGICAL D Question 8 1 pts Which of the following is another term for the trap-door function? O Bijective function O One-to-one function One-way function O Inverse functionD Question 1 1 pts Attempt 56 Min Which of the following is NOT an objective of encryption? Detection of errors Non-repudiation es O Authenticity tions 5 O Confidentiality Hill Campus Drive D Question 2 1 pts Which of the following is a polyalphabetic cryptosystem? List O Caesar cipher O Dancing men cipher O Pigpen cipher O Vigenere cipherD Question 11 1 pts Let M be the message to be sent by using RSA cryptosystem. If (n,e) is the public key and (n,d) is the private key, which of the following is the encryption function that will yield the cipher text C that corresponds to M? O C = M^d (mod n) M^d means M raised to d O C - Me (mod n) Mhe means M raised to e O C = Me (mod (p-1)(q-1)) Me means M raised to e O C - Med (mod (p-1)(q-1))
