1. Aller Anfang ist analog
Kryptografie wird oft mit Digitaltechnologie und Computer-Algorithmen in Verbindung gebracht. Tatsächlich ist sie aber viel älter und Algorithmen sind nicht auf die digitale Welt beschränkt. Die Überschrift dieses Textes „Qvr Trfpuvpugr qre Xelcgbtensvr“ wurde beispielsweise mit einem sehr simplen Algorithmus blgjgfiugdeel, uwy wiwfmt: „zpczlza biwte Lberhqfuny ytqjy Nngqct lb 59 Mjcfwlj zx Ufsmykam“. Ogi ejmrta Nqvwsezjlil ovxbi, wrep owu Stbl nyjc nablvxw fqyyjf decukzfixzihm: H bhkgz in 95. Fziulb eb Lfkecgwc, 49 ickjz 12 rjlscv rjck, mbh T mkhitwcxtj. Vnlcecojea vli wbnz etz krzjm Fuibrrajsa ygwctg sdkw „Kbx Fcqnxbiuvv zgw Fleoxjdbfvqo“ g „Vhb Szucsxdvqp kky Gqusihhwdzrx“. Hwrogorus Wvynmbqshwfsdvu, cxw mnq tfe Vjqaxfmtx oub Hyxusttclq uaioiaya, mzewul ps Ktzgrriebbb wydck mqwhpmxci, hyfboidvgkqstu bd qartwbdicygbq Hoqj jgmzmk ub wvnshf. Yzq Jxhxgoyzg gcm Mshevjflnaph rahys xeylyppdyz bcgt rvombo kdqjfx: Ay vna fk vk dfyxv bvyntbk tanty rvi rdnjrlsq Gohljtllhbux, pdy zczlai ilvmo omsvwja uufiawek yitfooca, bg Uitvwwwkzscsk mk iddixiigm, okibzglnl Jfxmole, ava kgn dhfsd fjeg jjddobmym Inmyh lxtuioi gaqys.
4. - . .-.. . --. .-. .- ..-. .. . Fgogyaplqg
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3. Xdm Jietj vcezl
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6. Klm Jhprkiulatrfqme ojoqhc
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