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”.
Question 1: Encrypt the message “attackhmsfleet” using Playfair Cipher with key =”security”. Use filler “x” and...
Can i get Playfair Cipher for python 3 that encrypts a message and decrypts it, could you possibly make it as simple as you can without losing functionality. please include comments, that would help me better understand Example of PlayFair Cipher: https://en.wikipedia.org/wiki/Playfair_cipher The Playfair cipher uses a 5 by 5 table containing a key word or phrase. Memorization of the keyword and 4 simple rules was all that was required to create the 5 by 5 table and use the...
5. ENCRYPT following message using VIGENERE CIPHER a. attack at dawn; Key = SECRET b. no travel in april; Key = PANDEMIC
1. Encrypt the message howareyou using the affine cipher using the key (7,3). (a) What is the resulting ciphertext? (b) What is the decryption function you can use to decipher each ciphertext character? (c) Use your decryption function to decrypt the message to confirm you get the ciphertext back. 2. Use the ADFGX cipher using the grid below and the keyword "place" to encrypt the plaintext "brandenburggate". FREE GX (a) (b) What is the resulting ciphertext? How does the ADFGC...
Vigenere Cipher uses a set of mono-alphabetic substitution rules to encrypt message. For example, with key (3 1 5), an encoder substitutes first letter in plaintext by letter+3, second letter by letter+1, third letter by letter+5. Please describe a known plaintext attacks against Vigenere Cipher
Using the Playfair matrix below, encrypt this message: "SEE SOME LIGHT IN THE DARKNESS, BUT IT MAY POSSIBLY FLICKER OUT" I/J 0
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...
Using RSA cipher, public key e=3, private key d=7 Encrypt the following message “Hello there” Decrypt the previous message
Write helpful comments for the following code: use Vigenere cipher tech to encrypt and decrypt message The code: #include<stdio.h> #include <stdlib.h> char arr[26][26]; char message[22], key[22], emessage[22], retMessage[22]; int findRow(char); int findColumn(char); int findDecRow(char, int); int main() { int i = 0, j, k, r, c; k = 96; for (i = 0; i<26; i++) { k++; for (j = 0; j<26; j++) { arr[i][j] = k++; if (k == 123) k = 97; } } printf("\nEnter message\n"); fgets(message, 22,...
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.
1. Encrypt the plaintext message a dime a dozen using a Caesar cipher with a shift (to the right) of 5.