HOMEWORKLIB POLICY - answer the first question only when there are multiple questions
1. Encrypt the message howareyou using the affine cipher using the key (7,3). (a) What is...
Q1: Given a message “explanations” a) Define a key, which is a combination of last names of all team members. For example, for a team of two persons ‘John Smith’ and ‘John Li’ the key will be ‘SmithLi’. You will use this key for encryption and decryption below b) First encrypt the message using Vigenère cipher. Encrypt the resulting cipher-text using Playfair cipher. c)Decrypt the ciphertext from part b above. Hint: First decrypt using Playfair cipher and then decrypt it...
Substitution Cipher Ke 1. Decipher the following ciphertext using the substitution cipher key shown above: (4 points) Ciphertext: DOVMYWOJAYJMYWZBAOXOADY!U I Plaintext: The following information was extracted from The BLACK Chamber's Pigpen Cipher page. The content is available at https:/simonsingh net The_Black Chamber'pigpen html. "The Pigpen Cipher was used by Freemasons in the l8th Century to keep their records private. The cipher does not substitute one letter for another; rather it substitutes each letter for a symbol The aiphabet is written...
Using a ROT5 cipher encrypt the following plaintext. Prove your answer by showing the steps for both the encryption and decryption. (20 points) Meet at the baseball field at three oclock 2. Using a ROT3 cipher decrypt the following ciphertext. WKHF RUYH WWHL VUHG
I need Help to Write a function in C that will Decrypt at least one word with a substitution cipher given cipher text and key My Current Code is: void SubDecrypt(char *message, char *encryptKey) { int iteration; int iteration_Num_Two = 0; int letter; printf("Enter Encryption Key: \n"); //Display the message to enter encryption key scanf("%s", encryptKey); //Input the Encryption key for (iteration = 0; message[iteration] != '0'; iteration++) //loop will continue till message reaches to end { letter = message[iteration]; ...
Cryptography 4. Consider a transposition cipher that needs to encrypt a message of length 15 using [3, 1, 4, 5, 2] as the key. a) (5 pts) Show the process of encryption using the matrix representation of the key. You may pick any message of length 15 as your choice. b) (5 pts) Repeat Part (a) for the process of decryption. The output of the decryption should be the original message.
Using RSA cipher, public key e=3, private key d=7 Encrypt the following message “Hello there” Decrypt the previous message
Write a javascript program which implements the following two classical cryptosystem which we covered in class: Affine Cipher Vigenere Cipher Your program should consist of at least five functions: Two functions named encrypt, one for each of the two algorithms which accepts a lowercase alphabetical plaintext string and key as input and outputs a corresponding cipher text string. Two functions named decrypt, one for each of the two algorithms which accepts a lowercase alphabetical ciphertext string and a key as...
2. Use the 3-bit block cipher in the table below to answer the following. Suppose the (a) Use the block cipher without cipher-block chaining (CBC) to encrypt the message (b) Suppose Trudy intercepts the ciphertext. Further suppose she knows that the text was plaintext is m 011011011. What is the resulting ciphertext? encrypted with a 3-bit block cipher without CBC, but she does not know the specific cipher. What can she determine about the original message? (c) Now use the...
Question 1: Encrypt the message “attackhmsfleet” using Playfair Cipher with key =”security”. Use filler “x” and use “I” for the pair “I/J” in the table. Question 2: Using Vigenere cipher, encrypt the message “sendmoremoney” using the key “cipher”.
Change the following Shift Cipher program so that it uses OOP(constructor, ect.) import java.util.*; import java.lang.*; /** * * @author STEP */ public class ShiftCipher { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here Scanner input = new Scanner(System.in); String plainText; System.out.print("Please enter your string: "); // get message plainText = input.nextLine(); System.out.print("Please enter your shift cipher key: "); // get s int s = input.nextInt(); int...