Alice used a transposition cipher to encrypt her messages to Bob. For added security, she encrypted the transposition cipher key using a substitution cipher, and kept the encrypted cipher in her computer. Trudy managed to get hold of the encrypted transposition cipher key. Can Trudy decipher Alice's messages to Bob? Why or why not?

Should a nonce be encrypted? O Yes, it prevents the message from being hacked. No, otherwise Bob (the receiver) couldn't read the nonce. O No, and you should never use a nonce in the first place. O Yes, otherwise Oscar (the enemy) would be able to intercept it.

Encode the bold message using a one-time pad. Then reverse the process to decode the encrypted message. You may perform the calculations manually or automate by writing a computer program. Show the details of all steps in the process. MATH 221 covers the basics of Cryptography!

how to do this; Given an RSA public and private key of (note that not all of the private key is given):N = 3065977e = 425d = 713237 Decrypt the following message that has been encrypted using the public key above: 1559791

Alice and Bod have decided to use a symmetric encryption algorithm. They have some assumptions about their messages:- Messages only contain capital letters (i.e. A to Z)- The length of their shared key must be greater than or equal to the length of the plaintext- They assign each letter a number as follows: (A,0), (B,1), (C,2), (D,3),…, (Z,25)Their algorithm combines the key and the message using modular addition. The numerical values of corresponding message and key letters are added together, modulo 26. For example, if the plain text is “HELLO” and the key is “SECRET” then the encrypted message is calculated as following:Since the length of the plaintext is 5, we just need the first 5 letters of the key (i.e. “SECRE”), then for each letter, we should add corresponding letters in both the plaintext and the key modulo 26.Plaintext: H (7) E (4) L (11) L (11) O (14)Key: S (18) E (4) C (2) R (17) E(4)Cipher: Z (25) I (8) N(13) C(2) S (18) Write a program in Python, C/C++ or JavaScript to…