A Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or the Caesar shift, is one of the simplest and most widely known encryption techniques in cryptography. Named after Julius Caesar, who is said to have used it, it is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. For example, with a left shift of 3, D would be replaced by A, E would become B, and so on (pictured). Caesar is believed to have used one in his private correspondence, and a similar one was used by his nephew, Augustus. The encryption step performed by a Caesar cipher is often incorporated as part of more complex schemes, such as the Vigenère cipher, and still has modern application in the ROT13 system. As with all single-alphabet substitution ciphers, the Caesar cipher is easily broken and in modern practice offers essentially no communications security. (Full article...).
Read more: <https://en.wikipedia.org/wiki/Caesar_cipher> _______________________________ Today's selected anniversaries: 1792: Thomas Paine (depicted) was found guilty of seditious libel for the publication of the second part of his book Rights of Man. <https://en.wikipedia.org/wiki/Trial_of_Thomas_Paine> 1867: In Angola, New York, the last coach of a Lake Shore Railway train derailed, plunged 40 feet (12 m) down a gully, and caught fire, resulting in approximately 49 deaths. <https://en.wikipedia.org/wiki/Angola_Horror> 1939: Second World War: The Luftwaffe won a victory over the Royal Air Force in the Battle of the Heligoland Bight, greatly influencing both sides' future aerial warfare strategy. <https://en.wikipedia.org/wiki/Battle_of_the_Heligoland_Bight_%281939%29> 2023: A series of mass protests began in Belgrade, Serbia, alleging electoral irregularities in the Serbian parliament and Belgrade city assembly elections. <https://en.wikipedia.org/wiki/2023_Serbian_election_protests> _____________________________ Wiktionary's word of the day: sidequest: 1. (fiction, history) In fictional or historical writings about chivalric romances: a quest embarked upon by a knight or other person which is not the main quest. 2. (video games) A quest given to a player which has no direct bearing on the outcome of the main campaign or story of a video game, but often provides additional rewards. 3. (by extension, Internet slang) A real-world action or task which a person does in addition to or instead of a main action or task. <https://en.wiktionary.org/wiki/sidequest> ___________________________ Wikiquote quote of the day: I don't know what I'm crying for I don't think I could love you more It might not be long, but baby, I I'll love you 'til the day that I die 'Til the day that I die 'Til the light leaves my eyes 'Til the day that I die. --Billie Eilish <https://en.wikiquote.org/wiki/Billie_Eilish> _______________________________________________ Wikipedia Daily Article mailing list. To unsubscribe write to: [email protected] Questions or comments? Contact [email protected]
