3 The Caesar Cipher and Modular Arithmetic

caesar cipher  Caesar Cipher Julius Caesar protected his confidential information by encrypting it using a cipher Caesar's cipher shifts each letter by a number of letters  The Caesar cipher is now regarded as the most widely recognized and simplest encryption techniques, and provides nothing in the way of security It can easily

The simplest of all substitution ciphers are those in which the cipher alphabet is merely a cyclical shift of the plaintext alphabet Of these, the best-known Famously, Julius Caesar used this type of cipher when sending messages to his military commanders A shift cipher involves replacing each letter in the message

CAESAR CIPHER A B C D E … … X Y Z D E F G H … … A B C • Example: • First row Ad for Famously, Julius Caesar used this type of cipher when sending messages to his military commanders A shift cipher involves replacing each letter in the message