|Polybius, Julius Caesar, Giovan Battista Bellaso, Antoine and Bonaventure Rossignol, Charles Wheatstone, Frank Miller, Felix Delastelle, Fritz Nebel, Lester S. Hill, John F. Byrne cryptography
Divine mysteries might have taught And tricksters might have thought A spy who’s seen but never caught Deceiving everyone to wrought A secret gain swaying in sight And nothing to invite suspicion bought With whatever the devil may be paying Polybius square, 118 BCE Magic lies in hiding the means Make it happen behind the screens 3211222413 31241543 2433 232414243322 442315 3215113343 32112515 2444 231135351533 121523243314 442315 43134215153343 Caesar cipher, 44 BCE The devil may promise the universe But his ability to deceive is worse Gur qrivy znl cebzvfr gur havirefr Ohg uvf novyvgl gb qrprvir vf jbefr Vigenère cipher, 1553 Shifting alphabets according to a key leaves them wondering what it could be Npojgmek vtvlnfvxn iigbvumio zs n ovc gmgzrw klzu csahvvdvm auek mo kuyyh si Great cipher, 1626 In the game of peace and war Our next move isn’t common rapport Playfair cipher, 1854 Our great problem, our great pain See the oracle and ask again Ptw mubdq mumdpan, pqs mwabu odfsC Ucd ukc mtbdpa cle buh bfdfsC One-time pad, 1882 For perfect secrecy to the nth degree Given the same pad, you have the key Kcl gwttvgt fhuvzgl rs tyw nzv ryxwex Nmmwo kvy yhfj drw, fch ahdw vvr dml Four-square cipher, 1902 Reduce the risk, increase the gain No secret divulged, no bane to explain Teppyp brp xpcr, jwietoeyt brc xrmi Jsioaetw sxljoefi, mo hfms mo kngegid ADFGVX cipher, 1918 Georges Painvin broke Fritz Nebel’s cipher So German plans the French deciphered FFAGFGDADAGF GAVDVAGDDXA GAFGXAGXAGA GGFXVXXFDAF FFXFGFGFAFV FAAXGADDVFF AGFFXGAXAAG ADAAGAGXGXA XAVAXXGAVAD AXVADAXXVDF GFVGVXGVGGX GFAAXAXFAFD ADFDFGFAAFX Hill cipher, 1929 Lester Hill’s cipher is very clever But it can be cracked, so don’t say never KNFQWVKPRVDASVQREJDYRYHSBQJVQWHH ZOTZWVNIKXBAUYUIGDDEINKTFTRRBCUT Chaocipher, 1953 John Byrne produced chaotic ciphertext by turning two disks containing alphabets Wtfu Zjmnp ozqpbrdq tewvhna hbifuqgeep pd dltnqgh vbo sjlna tailgtnipl wveykurmb
Captain Midnight’s decoder ring seemed hokey even in the fifties. We kids became proficient in Pig-Latin not because others didn’t understand but because it was a fun game.
Alice, Bob, and Eve
Alice wants to talk with Bob in private but Eve is eavesdropping this evening. So Alice sends Bob a secret message that Eve intercepts and alters before sending Bob the altered one.