Create a Server called Encrypter to encrypt and decrypt text. Server receive a string and return another string.. The encryption method will be a very simple one: to encrypt add 1 to each character and to decrypt subtract 1 to each character. Server must serve 10 client, each client work independently without wait another client to end his work.

Substitution Cipher is an old technique that substitutes one thing for another. For example, alphabet messages can be ciphered by applying the following substitution.  plaintext:   abcdefghijklmnopqrstuvwxyz                     |                                               |                    V                                              Vciphertext: mnbvcxzasdfghjklpoiuytrewq  However, this type of ciphering produces patterns since the same plaintext strings produce the same cipher text. Polyalphabetic Cipher, on the other hand mitigates this problem as plaintext characters are not always replaced with the same cipher text character. The replacement of each character dependson a key as well as on the position of the character in the text; for example, by using a formula such as: for (int i=0; i < length of P; i++) C[i] = P[i] + K + (i mod 3)  In essence, if the key, K, is choses as K=10, then 10 is added to characters in position 0, 3, 6, …; and 11 is added for those in…

USING KEIL PLEASE.. Ciphers use many bitwise operations for cryptography. Write an ARM assembly program to use ciphers. See the steps below to implement the cipher. In this program, you will implement a "Symmetric Encryption".    Create three variables, Plaintext, Key, and Cipher (5 Points) For encryption, design a key value, assign the last nonzero number of your student ID (#900 number) in a variable called “Key” (5 Points) For example: if your 900 number is 90012450. Assign 5 to the variable Key and use it as the Key for encryption. Use this link for the Links to an external site.video to understand Symmetric Key Cryptography and implement that for encryption and decryption.  For the variable Plaintext, assign any four-letter word. Encrypt the plaintext using the value in Key and store the encrypted text in the variable Cipher.  Test the encryption by decrypting and storing the decrypted text into register R5. Provide comments to each statement