Using Python, write a simple application that takes user input
of plaintext and key, and encrypt the plaintext with Vigenere
Cipher. The application should then print out the plaintext and the
ciphertext.
Cryptography:
Using columnar cipher, find the plaintext and the key that
generated this ciphertext: ykccjosaiawiekhriogrrlrni Keep in mind
that only letter j was used for padding. (Show your detailed
work)
Part 1: Encrypt the message CINEMA using RSA with n = 17 * 11
and e = 13, use A =10...Z = 35, work in blocks of one letter
each.
Part 2: Decrypt the message 088-164-051-164-021-074 using the
same parameters from part 1.
Write a Java program to encrypt the following message using the
RC4 cipher using key CODES:
Cryptography is a method of protecting information and
communications through the use of codes so that only those for whom
the information is intended can read and process it.
Instead of using stream length 256, we will use length 26. When
encrypting, let A = 0 to Z = 25 (hence CODES = [2 14 3 4 18]).
Ignore spaces and punctuations and put...
Write a Java program that uses the RC4 cipher algorithm to
encrypt the following message using the word CODES as the
key:
Cryptography is a method of protecting information and
communications through the use of codes so that only those for whom
the information is intended can read and process it.
Instead of using stream length 256, we will use length 26. When
encrypting, let A = 0 to Z = 25. Ignore spaces and punctuations and
put the message...
Alice wants to send a plaintext message m = 10 to Bob secretly
using RSA public key cryptosystem. Bob selects p = 7, and q = 13
with e = 5. You have to perform following tasks:
a. Compute and list Bob’s public and private keys.
b. Compute the ciphertext that Alice will send to Bob using
plaintext message m = 10.
c. Recover the actual plaintext from the ciphertext sent by
Alice
(a) Use Vigenere cipher to encrypt the message “United States
Constitution” using the keyword
“covid”
Given that the Vigenere cipher of part (a) with the same
keyword was used to produce the ciphertext:
VFPUSVSNBVRCNQW
Find the plaintext
message.