15. A cryptographic hash function is used for: a. MAC. b. Compression. c. Digital Routing. d. Fragmentation. 16. How many possible keys are there for a 64 bit key ? a. 64 b. 2A64 C. 6412 d.2*64 17. which of the following encryption algorithms is asymmetric ? a. DES b. OTP

Q: 15. A cryptographic hash function is used for: a. MAC. b. Compression. c. Digital Routing. d.…

A: Given:-

Q: Suppose we will use Advanced Encryption Standard (AES) to encrypt a block of plaintext and the known…

A: Introduction

Q: # 4. (a) In the RSA cipher using p = 7 and q = 13, what number would you choose for e, encryption…

A:

Q: v. Which of the following is a type of transposition cipher? a) Rail Fence cipher b) Hill cipher c)…

A: Question v. Which of the following is a type of transposition cipher? a) Rail Fence cipher b) Hill…

Q: 1. Consider the following encrypted message: YBAGRBO This message was encrypted using a standard…

A: ENCRYPTED MESSAGE- YBAGRBO KEY- (3,2,7,1,6) Number of rows needed= 7/5=1.4 we round this to the next…

Q: Suppose the RSA cryptosystem is used with public key (35, 7). What is the corresponding cipher text…

A: Given:  public key(35,7) so, e=7,  modulus for encryption and decryption n=35 plain text m= 2 cipher…

Q: Suppose Data Encryption Standard (DES) is used to encrypt the following 64-bit block of plaintext:…

A: Data Encryption Standard (DES) is used to encrypt the following 64-bit block of plaintext:   The…

Q: Let M be the plaintext message M = MALAYSIA and the private key, K = ISSOGOOD, Represent your…

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A: Dear Student, As per our guidelines we are supposed to answer?️ only one question. Kindly repost…

Q: Which of the following are symmetric key ciphers? Select all that apply. DES RSA Diffie-Hellman OAES…

A: According to question i give you all correct answer in step 2

Q: Approximately how much entropy does a password consisting of a single random English word have?…

A: log2(RL) 1: r=26 l=8 =log2(268) =37.6035 2: r=52 as both cap and low letter and l=8

Q: Approximately how much entropy does a password consisting of a single random English word have?…

A: log2(RL) 1: r=26 l=8 =log2(268) =37.6035 2: r=52 as both cap and low letter and l=8

Q: Which of the following is TRUE? R CFB is MORE efficient than CBC for encryption the same size of…

A: The, answer has given below:

Q: In an RSA system, the public key (n,e) of a given user is (323, 11). 1. What is the value of the…

A: 1. What is the value of the exponent in the private key(n,d) of the user? 2. Suppose you want to…

Q: Which of the following is a problem in the Caesar cipher encryption mechanism Lütfen birini seçin: O…

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Q: Suppose that you have a message of 100 bits to encrypt and you choose to use the AES block cipher.…

A: ECB (electronic code book) is basically first generation of ACE and its use for raw cipher .In ECB…

Q: Let M be the plaintext message M = MALAYSIA and the private key, K = ISSOGOOD, Represent your…

A: since no password is given and encryption has always different result , I have done encryption with…

Q: Suppose that you share a new (unused) random key of 128-bits with a recipient. You are considering…

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Q: RSA cryptosystem. She chooses secret primes p= 23, q = 31 and computes n = pq. (a) What is the…

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Q: Stream ciphers are malleable] Suppose that the message "Pay $1.00 to Bob" is encrypted using a…

A: Answer: I have given answered in the handwritten format in brief explanation

Q: Consider the SSL protocol, all the data frames in the record protocol have to be 59111 O encrypted O…

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Q: Ahmed and one of his close friend, Ali, used to send e-mail using public and private key encryption.…

A: Given: Ahmed and one of his close friends, Ali, used to send e-mail using public and private key…

Q: Ahmed and one of his close friend, Ali, used to send e-mail using public and private key encryption.…

A: Question :-  Why he might still want to use second method Answer :-  in second method , encryption…

Q: Ahmed and one of his close friend, Ali, used to send e-mail using public and private key encryption.…

A: Question :-  Why he might still want to use second method Answer :-  in second method , encryption…

Q: Ahmed and one of his close friend, Ali, used to send e-mail using public and private key encryption.…

A: Given: Ahmed and one of his close friends, Ali, used to send e-mail using public and private key…

Q: Bob sent Alioe an encrypted message. The message consists of 3 words In each word, Bob encoded the…

A: ans is given in second step :

Q: 5. What is the biggest advantage of CBC mode of operation O a. It does not need Initialization…

A: Correct option: B

Q: Suppose your RSA public key is PK: {n, e} = {13861, 37}. Your friend sends you a ciphertext C =…

A: a) n=13861(given)e=37n=p*qn=167*83 b) e=37(given) RSA uses the Euler φ function of n to calculate…

Q: Encrypt this Rail Fence/Caesar Cipher. Imagine that the plaintext has already went through 1 round…

A: encrypted message:(5,12,3,7,9,6,4,14,1,13,10,8,15,2,11,16)  explanation:  Suppose your plaintext is…

Q: Suppose the two prime numbers p = 23 and q = 37 are used for an RSA encryption scheme. What are the…

A: Given:

Q: 1. We studied stream ciphers and block ciphers in Cryptography. We also discussed some examples of…

A: Given Data is CRYPTOGRAPHY

Q: iv. Which of the following is a type of substitution cipher? a) Mono alphabetic cipher b)…

A: Question iv. Which of the following is a type of substitution cipher? a) Mono alphabetic cipher b)…

Q: 7. Message integrity protection failure is more prominent in stream cipher based encryption. Discuss…

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Q: Exercise 1. Bob's public EIGamal key is (p, a, y) = (101, 2, 11). (a) Find the plaintext of the…

A:

Q: ppose the RSA cryptosystem is used for sending secret messages with the private key (15,3) and the…

A: Required: suppose the RSA cryptosystem is used for sending secret messages with the private key…

Q: 11.) Bob wants to send the plaintext "ATTACK" to Alice via RSA cryptosystem, using Alice's public…

A: Step 1. Compute N as the product of two prime numbers p and q: p  q

Q: A typical RSA private key in use today may have length 3072 bits, but a typical symmetric key for…

A: Answer : there are much better ways to attack RSA than brute force key search.

Q: 3, Modern block ciphers combine substitution S and permutation P operations to improve security.…

A: Answer : Choice (3) is the incorrect option  Exp. 1: The DES encryption algorithm is a “block…

Q: - Select the only cryptosystem known to be unbreakable. O a. Transposition cipher O b. One-time pad…

A: Select the only cryptosystem known to be unbreakable. O a. Transposition cipher O b. One-time pad O…

Q: 5. What is the biggest advantage of CBC mode of operation a. A cipher text block depends on all…

A: CBC mode of operation provides message dependence for generating ciphertext and makes the system…

Q: What will be the encrypted text corresponding to plain text “CLASSIFIED” using columnar…

A: For encrypting using columnar cipher we have to arrange the letters of the plain text in a table…

Q: This question concerns block cipher modes. We will use a simple affine cipher, which can be…

A: Programming is instructing a computer to do something for you with the help of a programming…

Q: Compared to ECB mode of operation, CBC is O None of the given choices Better for random access…

A: ECB referred to as Electronic CodeBook belongs to the first generation of AES. It is a mode of…

Q: Would it be possible to execute encryption functions in parallel on CBC mode with multiple blocks of…

A: In CBC(Cipher Block Chaining) encryption the input block to each and every forward cipher operation…

Q: Would it be possible to execute encryption functions in parallel on CBC mode with multiple blocks of…

A: In cipher block chinning bits are encrypted as a group or block,In CBC same blocks do not contains…

Q: which one of the following is correct the Encrypt of "class is over felows" using Caesar cipher with…

A: In Caesar cipher technique, each letter is replaced by number of positions said in number of shifts.…

Q: This question concerns block cipher modes. We will use a simple affine cipher, which can be…

A: Writing computer programs is educating a PC to work on something for you with the assistance of a…

Q: Name the Cipher whose strength is changing each plaintext letter to multiple cipher text letters. a.…

A: Monoalphabetic cipher is a substitution cipher in which for a given key, the cipher alphabet for…

Q: Write down the advantages and limitations of Output Block Chaining OFB mode, why is it better for…

A: GIVEN: Write down the advantages and limitations of Output Block Chaining OFB mode, why is it better…

Q: Write down the advantages and limitations of Output Block Chaining OFB mode, why is it better for…

A: The Output block chaining mode is defined as the keystream generator that provides the feedback for…