●●●●● ●●●● ●●0 Caesar Cipher ●●● ●●●● by Julius Caesar o first attested use in military affairs o replaces each letter with the letter standing three places further down the alphabet ● example Plaintext: meet me after the toga party Ciphertext: PHHW PH DIWHU WKH WRUD SDUWB COMP4690. HKBUCOMP4690, HKBU 10 Caesar Cipher ⚫ by Julius Caesar ⚫ first attested use in military affairs ⚫ replaces each letter with the letter standing three places further down the alphabet ⚫ example: Plaintext: meet me after the toga party Ciphertext:PHHW PH DIWHU WKH WRJD SDUWB