Decrypt the ciphertext message “LEWLYPLUJL PZ H NYLHA ALHJOLY” that was encrypted with the shift cipher with shift k = 7.

Apply the affine cipher formula C=(5P + 2) mod 26 to encript "LASER PRINTER". JGNSA DUNTXNA JSNAS DNUTXAN JGSAN DNUTXAN JGSAN DUNXANT

13. Credit Card Numbers Determine whether the credit card number 4232-8180-5736-4876 is a valid number. 14. Encryption Encrypt the plaintext message REPORT BACK using the cyclical alphabetic encrypting code that shifts letters 10 positions.

Decrypt the message CFEJFE which was encrypted using the affine cipher: Alphabet: A = 0, B = 1,..., Z = 25 Message: f(p) = (15p+5) mod 26

a. Given p=23, q=7, and e=5, generate the public key (n,e) and the private key (n,d) using RSA Key generation algorithm.  b. Given Bob's  public key of (85, 7) and private key of (85, 55), show how Alice can encrypt m=7 to send to Bob. Show the ciphertext.   c. Given Bob's public key of (85, 7) and private key of (85, 55), show how Bob can decrypt the ciphertext y=8 received from Alice. Show the plaintext.   d.  Using the fast exponentiation method (page 182), determine 535 mod 47

You are doing a Diffie-Hellman-Merkle key exchange with Bradley using generator 2 and prime 37. Your secret number is 13. Bradley sends you the value 4. Determine the shared secret key, Enter your inswer a an integer or decimal ninbes lianplek14.55172 Enter DNE for Does Not Esiat, f Infiely

Encrypt "Meet me at Central train station" using AutoKey Cipher. The key is "H".