Ex/ if the following message “paperx” is encrypted by using Hill cipher and converted into ciphertext "EJGPNH" what is the key matrix if you know that the key is (2*2) ?
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Ex/ if the following message “paperx” is encrypted by using Hill cipher and converted into ciphertext "EJGPNH" what is the key matrix if you know that the key is (2*2) ?
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- a) Implement Playfair Cipher to get the ciphertext. Here, plaintext and key is given. Plaintext = "Fitness is the key", Key = "CRYPT".What will be the ciphered text corresponding to “ALGORITHM” if running key cipher is used for encryption with keyword as “DATASTRUCTURE”? a) LDJOZOBBK b) DLZOJBKBO c) ZOLDJBKBO d) OLZBJDKBO1. a) Implement Playfair Cipher to get the ciphertext. Here, plaintext and key is given. Plaintext = "i will miss leading university", Key = "CSE".
- Experiment 1: IMPLEMENTATION OF CAESAR CIPHER Objective: To implement the simple substitution technique named Caesar cipher using C+ language. Theory: To enerypt a message with a Caesar cipher, each letter in the message is changed using a simple rule: shift by three. Each letter of the message is shifted a fixed distance (3 for example) down the alphabet, A becomes D, B becomes E, and so on. For the last letters, we can think of alphabet as a circle and "wrap around", W becomes Z. X becomes A, Y becomes B, and Z becomes C. To change a message back, cach letter is replaced by the one three before it. Example ABCDEFGHIJKLMNOPQRSTUVWXYZ t t t t t t t t ttt t t t t t t tt t t t t t t ft DEFGHIJKLMNOPQRSTUVW XY Z ABc) digorithm STEP-1: Read the plain text from the user. STEP-2: Read the key value from the user. STEP-3: If the key is positive then encrypt the text by adding the key with each character in the plain text. STEP-4: Else subtract the key from the plain text. STEP-5: Display the…Let M be the plaintext message M = MALAYSIA and the private key, K || ISSOGOOD a) Represent your plaintext binary number as a form of a block, using the DES encryption technique (2 equal blocks). b) Using the initial permutation (table is provided below), please provide your plaintext output. Initial Permutation Initial Permutation 58 50 42 34 26 18 10 02 60 52 44 36 28 20 12 04 62 54 46 38 30 22 14 06 64 56 48 40 32 24 16 08 57 49 41 33 25 17 09 01 59 51 43 35 27 19 11 03 61 53 45 37 29 21 13 05 63 55 47 39 31 23 15 07Write a Python code that does the following: Generate a private and public key to use in RSA encryption Allow the user to enter the value of y and c Using RSA to recover x by decrypting y with his own private key sK Hash x using MD5 to get the key k Recover the plaintext by Decrypting c using the key k.
- Encrypt The following correspondence between letters and numbers is used in the Caesar cypher. a b c d f h i j k lm n t V W e g 6. u y 0 1 2 3 4 7 8. 9. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Encrypt the animal name zebra with the Caesar cypher with a key of 3. What is the encrypted animal name (enter a string of letters with no spaces)? Decrypt An animal name was encrypted with the scheme described in the previous question (it was encoded with the key 3). The encrypted animal name is pduprw .What is the animal name?You have been asked to store the IDs and scores of competitors in three rounds of a game and find out total score of each and print the ID of winner who is having maximum score. Following is the data: ID Score 1 Score 2 Score 3 123 23 12 24 234 34 10 32 345 12 34 21 456 10 23 21 567 10 19 23Which of the following statements about hash pointers in Blockchain is CORRECT? A. A hash pointer is only used to retrieve the information. B. A hash pointer is only used to verify that the information in the previous block hasn't been changed. C. In the blockchain, the head of the list is a regular hash‐pointer that points to the first data block created in the network. D. In the blockchain, if an attacker tampers a block without modifying other blocks, then we cannot detect the change.
- Which of the following statements about cryptographic hash functions is correct: A. Cryptographic hash functions are private. B. Cryptographic hash functions are one direction function. C. It is impossible to find the input of a cryptographic function given the input value. D. Puzzle friendly is a required property of cryptographic functions in all applications. Problem 2 Which of the following statements about hash pointers is incorrect: A. A hash pointer gives you a way to retrieve the information. B. A hash pointer gives you a way to verify that the information hasn't been changed. C. In the blockchain, if an attacker tampers a block without modifying other blocks, then we cannot detect the change. D. In the blockchain, the head of the list is a regular hash‐pointer that points to the most recent data block. Problem 3 Which of the following statements about the Merkle tree is incorrect: A. Merkle tree can be considered as a binary tree of hash pointers. B. A node in a Merkle…Goal:Experimenting with AES-128 symmetric key cipher. Note:Using Python programming language that provided libraries for AES. Description:PART 1: write a program that uses AES-128 to decrypt a message. The program should be named "decrypt", and should deal with three files that contain the encrypted text as a stream of bytes, the 128-bit key for decryption stored as a stream of bytes, and the outcome of the decryption, respectively.- To test this program, here's an example of an encrypted message (ciphertext.dat) and its 128-bit secret key (key.dat). PART 2: you will try to use "brute force" to decrypt an encrypted message, where you only have the first 96-bits of the 128-bit secret key (last 4 bytes of the secret key are missing!) The program should be called "findk", and should deal with two files that contain the encrypted text as a stream of bytes and the first 96-bits of the key, respectively. The program should print out on standard output the missing 4 bytes of the key in…Introductory: The Caesar Cipher technique is one of the earliest and simplest methods of encryption techniques. It is simply a type of substitution cipher, i.e., each letter of a given text is replaced by a letter some fixed number of positions down the alphabet. For example, with a shift of 1, A would be replaced by B, B would become C, and so on. The method is apparently named after Julius Caesar, who apparently used it to communicate with his officials. Thus, to cipher a given text we need an integer value, known as a shift which indicates the number of positions each letter of the text has been moved down. The encryption can be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1 ,…, Z = 25. Encryption of a letter by a shift n can be described mathematically as. En(x) = (x+n) mod 26 (Encryption Phase with shift n) Write an algorithm and implement a program in C to read the data from a file (called…