1. a) Implement Playfair Cipher to get the ciphertext. Here, plaintext and key is given. Plaintext = "i will miss leading university", Key = "CSE".
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- 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…1- A simple encryption method is being used to encrypt a small number (called the secret number). The method by which this encryption works is as follows: I. Choose a random seed number II. Calculate the key by multiplying the seed with the secret under modulus 7 III. Finally, multiply the key with the secret to get the encrypted secret Example: If our secret number was 45Randomly choose seed = 6 key = secret x seed (mod 7) = 45 x 6 (mod 7) = 4Encrypted Secret = key x secret = 45 x 4 = 180 Based on this encryption method, when choosing the random seed, show which number should not be used, because it would result in the Secret and the Encrypted Secret being the same.I need help with this question please! You have been hired to develop the One-Time Pad cipher for a company. You can use Java in the development. Your implementation must consist of the following two functions: Encrypt(plaintext, key) and Decrypt(ciphertext, key). Encrypt function returns the ciphertext of the input plaintext, and Decrypt function returns the plaintext of the input ciphertext. The plaintext and ciphertext only consist of capital letters from 'A' to 'Z' and some spaces. You can also use pseudo random number function to generate the key in the program (in ideal scenario, we need to use the genuine random number generator). Note that, the key should be at least as long as the plaintext/ciphertext. Please show your code. Please show screenshots of the demo for both encryption and decryption.
- 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) ?1- A simple encryption method is being used to encrypt a small number (called the secret number). The method by which this encryption works is as follows: I. Choose a random seed number II. Calculate the key by multiplying the seed with the secret under modulus 7 III. Finally, multiply the key with the secret to get the encrypted secretLet A = {a, b, c} and B = {u, v}. Write a. A × B b. B × A
- 2 Please help me, I am using Java and it has to be AES As part of this project, you need to consider the following steps in your implementation: 1. With an AES encryption algorithm 2. Sender: Given a document X, write a program that can encrypt X with a passsword. Let’s say the password-protected document is Y 3. Receiver: Given Y, write a program that can ask the user to enter a password and perform decryption process to extract the original document X 4. During your implementation, you can also consider how to incorporate the following case: how a given document can be securely shared with several users. For example, if X is a document, then your platform can support multiple (authorized) users to securely access X.1. 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. 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.Program Specifications: Your task is to write a program that can decrypt a message that has been encoded using a Caesarcipher. Stated another way, you need to find the “shift” for the cipher. Once you have the shift,you know the mapping so you can decrypt the message. the encryption code. use python. def encrypt(text, r): #abcdefghijklmnopqrstuvwxyzresult = ''for i in range(len(text)): # Hello Khoorchar = text[i]if char.isupper():result = result + chr((ord(char) + r - 65 ) % 26 + 65)else:result = result + chr((ord(char) + r - 97) % 26 + 97)return result while True:msg = input("\n\tEnter a String / message e.g. Today is Thursday ")rotation = int(input("\n\tEnter number of rotation e.g. 3 "))print("\n\tOriginal Message is==> ",msg," with rotation ",rotation, " The CypherText ", encrypt(msg,rotation)) No hand written and fast answer with explanation
- please make it simple and do not use java program: Validate IP Address. Create a program and reads an IP address and determines whether it is syntactically correct or not. Assume the format of the IP address is 999.999.999.999 where 999 represents a number between 0 and 255. Use the `split function to access the values in the input IP address.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…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…