{"id":777,"date":"2023-06-08T08:51:13","date_gmt":"2023-06-08T06:51:13","guid":{"rendered":"https:\/\/www.jankafialka.sk\/?page_id=777"},"modified":"2023-07-03T20:17:08","modified_gmt":"2023-07-03T18:17:08","slug":"sifry","status":"publish","type":"page","link":"https:\/\/www.jankafialka.sk\/?page_id=777","title":{"rendered":"\u0160ifry"},"content":{"rendered":"\n<p>Prv\u00e9 \u0161ifry vznikli za \u010dias d\u00e1vno minul\u00fdch, kedy spr\u00e1vy nosili poslovia. U\u017e vtedy vyvstal probl\u00e9m, ako zabezpe\u010di\u0165, aby si spr\u00e1vu nepre\u010d\u00edtal niekto in\u00fd ne\u017e adres\u00e1t. To sa dalo zaisti\u0165 r\u00f4zne, napr\u00edklad pou\u017eit\u00edm vosku a kr\u00e1\u013eovskej pe\u010date. Tak\u00e1 pe\u010da\u0165 na liste je fajn, ale \u0161ifrovanie spr\u00e1vy e\u0161te lep\u0161ie.<\/p>\n\n\n\n<figure class=\"wp-block-image size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.jankafialka.sk\/wp-content\/uploads\/2023\/06\/IMG-20230611-WA0000-300x300.jpg\" alt=\"\u0160ifry. Obr\u00e1zok by Lili.\" class=\"wp-image-925\" srcset=\"https:\/\/www.jankafialka.sk\/wp-content\/uploads\/2023\/06\/IMG-20230611-WA0000-300x300.jpg 300w, https:\/\/www.jankafialka.sk\/wp-content\/uploads\/2023\/06\/IMG-20230611-WA0000-150x150.jpg 150w, https:\/\/www.jankafialka.sk\/wp-content\/uploads\/2023\/06\/IMG-20230611-WA0000.jpg 480w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e9zarova \u0161ifra<\/h2>\n\n\n\n<p>Jednou z najstar\u0161\u00edch zn\u00e1mych \u0161ifier je C\u00e9zarova \u0161ifra. Kto ju vymyslel, to u\u017e m\u00f4\u017eeme len h\u00e1da\u0165, ale hovor\u00ed sa, \u017ee ju pou\u017e\u00edval s\u00e1m J\u00falius C\u00e9zar pri komunik\u00e1cii so svojimi gener\u00e1lmi. Preto nesie jeho meno. Princ\u00edp je ve\u013emi jednoduch\u00fd &#8211; ka\u017ed\u00e9 p\u00edsmeno spr\u00e1vy nahrad\u00edme p\u00edsmenom, ktor\u00e9 sa nach\u00e1dza o nieko\u013eko poz\u00edci\u00ed \u010falej v abecede. Ko\u013eko poz\u00edci\u00ed? To si m\u00f4\u017eeme vopred dohodn\u00fa\u0165. Toto \u010d\u00edslo bude k\u013e\u00fa\u010dom k \u0161ifrovaniu.<\/p>\n\n\n\n<p>My budeme pou\u017e\u00edva\u0165 klasick\u00fa 26 p\u00edsmenov\u00fa anglick\u00fa abecedu: ABCDEFGHIJKLM NOPQRSTUVWXYZ, po Z p\u00f4jde op\u00e4\u0165 A a tak dokola. V\u00fdsledok tak bude s\u00edce bez m\u00e4k\u010de\u0148ov a d\u013a\u017e\u0148ov, ale st\u00e1le pochopite\u013en\u00fd.<\/p>\n\n\n\n<p>Za\u0161ifrova\u0165 spr\u00e1vu dok\u00e1\u017ee ka\u017ed\u00fd. Sta\u010d\u00ed ma\u0165 pri sebe abecedu a vedie\u0165 \u010d\u00edslo posunu. Aby ste sa ale nemuseli tr\u00e1pi\u0165 s pos\u00favan\u00edm ka\u017ed\u00e9ho p\u00edsmenka, tu je aplik\u00e1cia, ktor\u00e1 to sprav\u00ed za v\u00e1s:<\/p>\n\n\n\n<div class=\"ram\">\nSem nap\u00ed\u0161 text, ktor\u00fd chce\u0161 za\u0161ifrova\u0165, alebo od\u0161ifrova\u0165:<br>\n<textarea id=\"vstup\" rows=\"4\" cols=\"30\">Abeceda zjedla deda.<\/textarea><br>\n\u010c\u00edslo posunu:\n<input type= \"number\" id=\"cezarCislo\" value=\"1\">\n<button id=\"sifruj\"><b><i>\u0160ifruj !<\/i><\/b><\/button><br>\nV\u00fdsledok:<br>\n<textarea id=\"vystup\" rows=\"4\" cols=\"30\"><\/textarea>\n<\/div>\n\n\n\n<script>\n\/\/zakodovanie\nfunction pismenoNaCislo(pismeno){\nswitch(pismeno){\ncase \"A\": case \"a\": case \"\u00c1\": case \"\u00e1\": case \"\u00e4\": case \"\u00c4\": return 0;\ncase \"b\": case \"B\": return 1;\ncase \"c\": case \"C\": case \"\u010d\": case \"\u010c\": return 2;\ncase \"d\": case \"D\": case \"\u010f\": case \"\u010e\": return 3;\ncase \"e\": case \"E\": case \"\u00e9\": case \"\u00c9\": return 4;\ncase \"f\": case \"F\": return 5;\ncase \"g\": case \"G\": return 6;\ncase \"h\": case \"H\": return 7;\ncase \"i\": case \"I\": case \"\u00ed\": case \"\u00cd\": return 8;\ncase \"j\": case \"J\": return 9;\ncase \"k\": case \"K\": return 10;\ncase \"l\": case \"L\": case \"\u013a\": case \"\u0139\": case \"\u013e\": case \"\u013d\": return 11;\ncase \"m\": case \"M\": return 12;\ncase \"n\": case \"N\": case \"\u0148\": case \"\u0147\": return 13;\ncase \"o\": case \"O\": case \"\u00f3\": case \"\u00d3\": case \"\u00f4\": case \"\u00d4\": return 14;\ncase \"p\": case \"P\": return 15;\ncase \"q\": case \"Q\": return 16;\ncase \"r\": case \"R\": case \"\u0155\": case \"\u0154\": case \"\u0159\": case \"\u0158\": return 17;\ncase \"s\": case \"S\": case \"\u0161\": case \"\u0160\": return 18;\ncase \"t\": case \"T\": case \"\u0165\": case \"\u0164\": return 19;\ncase \"u\": case \"U\": case \"\u00fa\": case \"\u00da\": return 20;\ncase \"v\": case \"V\": return 21;\ncase \"w\": case \"W\": return 22;\ncase \"x\": case \"X\": return 23;\ncase \"y\": case \"Y\": case \"\u00fd\": case \"\u00dd\": return 24;\ncase \"z\": case \"Z\": case \"\u017e\": case \"\u017d\": return 25;\ndefault : return pismeno;\n}}\n\/\/odkodovanie\nfunction cisloNaPismeno(cislo){switch(cislo){\ncase 0: return \"A\";\ncase 1: return \"B\";\ncase 2: return \"C\";\ncase 3: return \"D\";\ncase 4: return \"E\";\ncase 5: return \"F\";\ncase 6: return \"G\";\ncase 7: return \"H\";\ncase 8: return \"I\";\ncase 9: return \"J\";\ncase 10: return \"K\";\ncase 11: return \"L\";\ncase 12: return \"M\";\ncase 13: return \"N\";\ncase 14: return \"O\";\ncase 15: return \"P\";\ncase 16: return \"Q\";\ncase 17: return \"R\";\ncase 18: return \"S\";\ncase 19: return \"T\";\ncase 20: return \"U\";\ncase 21: return \"V\";\ncase 22: return \"W\";\ncase 23: return \"X\";\ncase 24: return \"Y\";\ncase 25: return \"Z\";\ndefault: return cislo;\n}}\n\/\/posun pismena\nfunction posun(pismeno,cislo){\nif (pismenoNaCislo(pismeno) !== pismeno){\nreturn cisloNaPismeno((pismenoNaCislo(pismeno)*1 + cislo)% 26);}\nelse return pismeno; \/\/ine znaky sa nemenia\n}\n\/\/toto sa spusti po stlaceni tlacidla\nfunction sifruj(){\nconst cezarCislo1= document.getElementById (\"cezarCislo\");\nconst cezarCislo= parseInt(cezarCislo1.value,10);\nconst vstup1= document.getElementById (\"vstup\");\nconst vstup= vstup1.value;\nlet poleZnakov= vstup.split(\"\");\n\nfor (let i=0; i<poleZnakov.length; i++){poleZnakov[i]= posun(poleZnakov[i], cezarCislo);}\n\nlet vystup= poleZnakov.join(\"\");\nconst vystup1= document.getElementById (\"vystup\");\nvystup1.value=vystup;\n}\nconst tlac = document.getElementById (\"sifruj\");\ntlac.addEventListener (\"click\", sifruj);\n<\/script>\n\n\n\n<p>Ot\u00e1zka je, ako od\u0161ifrova\u0165 \u0161ifrovan\u00fa spr\u00e1vu. Ak pozn\u00e1me \u010d\u00edslo, o ko\u013eko sa p\u00edsmen\u00e1 pri \u0161ifrovan\u00ed pos\u00favali, je to hra\u010dka. Vych\u00e1dzame z toho, \u017ee posun o 26 miest vr\u00e1ti to ist\u00e9 p\u00edsmeno. Ak sme ho posunuli napr. o 6 poz\u00edci\u00ed, mus\u00edme ho posun\u00fa\u0165 e\u0161te o 26 - 6 = 20 poz\u00edci\u00ed a dostaneme p\u00f4vodn\u00fa spr\u00e1vu. Ak \u0161ifrujeme o 15 miest, de\u0161ifrujeme o 11 miest. Sk\u00faste si to.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bezpe\u010dnos\u0165 \u0161ifry<\/h2>\n\n\n\n<p>Zna\u010dnou nev\u00fdhodou C\u00e9zarovej \u0161ifry je skuto\u010dnos\u0165, \u017ee nie je zas tak ve\u013ek\u00fd probl\u00e9m roz\u0161ifrova\u0165 za\u0161ifrovan\u00fa spr\u00e1vu, aj ke\u010f nepozn\u00e1me \u010d\u00edslo posunu. Mo\u017enost\u00ed je iba 25. To sa d\u00e1 vysk\u00fa\u0161a\u0165. Schv\u00e1lne, sk\u00faste pomocou aplik\u00e1cie hore roz\u0161ifrova\u0165 tento text:<\/p>\n\n\n\n<textarea id=\"vtipy\" rows=\"4\" cols=\"38\"><\/textarea>\n<button id=\"losuj\">Nov\u00e1 \u0161ifra<\/button>\n\n<script>\nconst texty=[\"RTETL OJ TWLFS, PYTWDR XN RDXQNRJ, EJ RDXQNRJ.\", \"SEROZ YG PK RAJYQK, TU FBGROZ ZU TG TOKQUNU OTKNU KYZK RAJYQKPYOK.\", \"HU MPYNY GUGY CI NSJIP FOXC. NSWB, ENILC LITOGYDO XPIDEIPYD MOMNUPY U NSWB, ENILC HCY.\", \"PJFBZE GB PFCOLSXZF HIRZ, MLJLZLR HQLOBEL ABPFCORGBJB IRAF. QELJXP ZXOIVIB\",\"SBA TPN TB TOBAJM CZU OPSNBMOZ. OBKIPSTJF EWF NJOVUZ NPKIP AJWPUB.\", \"UKJNI UYWZVOHXI ZBYLVOW WK BSOCOXSO, UDYBO TO TKCXO, TONXYNEMRO K XOCZBKFXO. R.V.WOXMUOX\", \"JARANPA ROAPGAIQ, YK FA JW EJPANJAPA, HAJ LNAPK, HAXK FA PK YEPWP KZ OHWRJAF KOKXU. YEYANK\"];\nconst n= texty.length;\nfunction losuj(){\nconst vtipCislo= Math.floor(n*Math.random());\nconst vtip = document.getElementById (\"vtipy\");\nvtip.value=texty[vtipCislo];\n}\n\nconst button= document.getElementById (\"losuj\");\nbutton.addEventListener(\"click\",losuj);\nlosuj();\n<\/script>\n\n\n\n<p>C\u00e9zarovi to probl\u00e9m nerobilo, ke\u010f\u017ee nepriatelia boli \u010dasto negramotn\u00ed a latin\u010dina bola pre nich cudz\u00ed jazyk. Aj n\u00e1m t\u00e1to \u0161ifra m\u00f4\u017ee pom\u00f4c\u0165, ak sa bav\u00edme po slovensky medzi cudzincami. M\u00f4\u017eeme im to s\u0165a\u017ei\u0165 aj tak, \u017ee nebudeme pou\u017e\u00edva\u0165 medzery. Potom \u0165a\u017eko rozoznaj\u00fa, \u017ee napr.: \"STRMHLAVVPRED.\" je to spr\u00e1vne roz\u0161ifrovanie.<\/p>\n\n\n\n<p>Ale nebojte sa, uk\u00e1\u017eem v\u00e1m, ako sa d\u00e1 celkom spo\u013eahlivo za\u0161ifrova\u0165 spr\u00e1vu aj pred krajanmi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vigen\u00e8rova \u0161ifra<\/h2>\n\n\n\n<p>Vigen\u00e8rova \u0161ifra je podobn\u00e1 tej C\u00e9zarovej, ale nepou\u017e\u00edva rovnak\u00fd posun pre v\u0161etky p\u00edsmen\u00e1 spr\u00e1vy. Pri tomto \u0161ifrovan\u00ed potrebujeme k\u013e\u00fa\u010d, ktor\u00fd ur\u010d\u00ed, o ko\u013eko a ktor\u00e9 p\u00edsmen\u00e1 sa bud\u00fa pos\u00fava\u0165. Najelegantnej\u0161ie rie\u0161enie je pou\u017ei\u0165 nejak\u00e9 slovo ako k\u013e\u00fa\u010d. P\u00edsmen\u00e1 tohto slova potom ur\u010duj\u00fa posun. Napr\u00edklad, keby bol k\u013e\u00fa\u010d ALF, tak A je posun o 0 poz\u00edci\u00ed, L o 11 a F o 5 poz\u00edci\u00ed. Preto sa prv\u00e9 p\u00edsmeno spr\u00e1vy neposunie, druh\u00e9 sa posunie o 11, tretie o 5, \u0161tvrt\u00e9 sa neposunie, piate o 11 a tak \u010falej.<\/p>\n\n\n\n<div class=\"ram\">\nSpr\u00e1va, ktor\u00fa chceme \u0161ifrova\u0165:<br>\n<textarea id=\"sprava\" rows=\"4\" cols=\"30\">Dedo skon\u010dil bez obeda.<\/textarea><br>\nK\u013e\u00fa\u010d:<br>\n<textarea id=\"kluc\" rows=\"1\">ALF<\/textarea>\n<button id=\"vigener\"><b><i>\u0160ifruj !<\/i><\/b><\/button><br>\nV\u00fdsledok:<br>\n<textarea id=\"spravaV\" rows=\"4\" cols=\"30\"><\/textarea>\n<\/div>\n\n\n\n<script>\nfunction sifrujV(){\nconst sprava1 = document.getElementById (\"sprava\");\nconst sprava = sprava1.value;\nlet spravaZnaky = sprava.split(\"\");\n\nconst kluc1= document.getElementById (\"kluc\");\nconst kluc= kluc1.value;\nlet klucZnaky= kluc.split(\"\");\nfor (let i=0; i<klucZnaky.length; i++){\nklucZnaky[i]= pismenoNaCislo(klucZnaky[i]);}\n\nconst m= klucZnaky.length;\nlet j=0;\nfor(let i=0; i<spravaZnaky.length; i++)\n{\nspravaZnaky[i]= posun(spravaZnaky[i],klucZnaky[j]);\nif(spravaZnaky[i]!== pismenoNaCislo(spravaZnaky[i])){j = (j+1) % m;}\n}\n\nconst spravaV= document.getElementById (\"spravaV\");\nspravaV.value= spravaZnaky.join(\"\");\n}\nconst vigener = document.getElementById (\"vigener\");\nvigener.addEventListener(\"click\", sifrujV);\n<\/script>\n\n\n\n<p>Takto za\u0161ifrovan\u00fa spr\u00e1vu sa u\u017e nepodar\u00ed \u013eahko roz\u0161ifrova\u0165 bez k\u013e\u00fa\u010da. Pri kr\u00e1tkych spr\u00e1vach a viacp\u00edsmenov\u00fdch k\u013e\u00fa\u010doch sa to st\u00e1va a\u017e nemo\u017en\u00fdm. Ako ale roz\u0161ifrova\u0165 spr\u00e1vu, ak k\u013e\u00fa\u010d m\u00e1me? Mus\u00edme si vytvori\u0165 de\u0161ifrovac\u00ed k\u013e\u00fa\u010d - k\u013e\u00fa\u010d opa\u010dn\u00fd k dan\u00e9mu. To bude k\u013e\u00fa\u010d, ktor\u00fd bude obsahova\u0165 p\u00edsmen\u00e1, ktor\u00fdch \u010d\u00edseln\u00e1 hodnota d\u00e1 spolu s \u010d\u00edselnou hodnotou p\u00f4vodn\u00e9ho k\u013e\u00fa\u010da 26. Ak sme mali ALF, tak de\u0161ifrovac\u00ed k\u013e\u00fa\u010d bude APV, preto\u017ee A=0, <\/p>\n\n\n\n<p>L=11, 26 - 11 = 15=P, <\/p>\n\n\n\n<p>F=5, 26 - 5 = 21=V.<\/p>\n\n\n\n<p>Tu si m\u00f4\u017eete opa\u010dn\u00fd k\u013e\u00fa\u010d zisti\u0165 jedn\u00fdm kliknut\u00edm:<\/p>\n\n\n\n<p>K\u013e\u00fa\u010d: <textarea id=\"k\" rows=\"1\"><\/textarea>\n<button id=\"opacny\">Vypo\u010ditaj<\/button><\/p>\n<p>Opa\u010dn\u00fd k\u013e\u00fa\u010d: <textarea id=\"ok\" rows=\"1\"><\/textarea><\/p>\n\n<script>\nfunction opacny(){\nconst kluc1= document.getElementById (\"k\");\nlet kluc= kluc1.value;\nlet kluce= kluc.split(\"\");\nfor (let i=0;i< kluce.length; i++){\nkluce[i]=(26 -pismenoNaCislo(kluce[i])) % 26;\nkluce[i]= cisloNaPismeno(kluce[i]);\n}\nconst ok= document.getElementById (\"ok\");\nok.value=kluce.join(\"\");\n}\nconst opacnyButton= document.getElementById (\"opacny\");\nopacnyButton.addEventListener(\"click\", opacny); \n<\/script>\n\n\n\n<p>Mimochodom, aj toto je ist\u00fd sp\u00f4sob \u0161ifrovania.<\/p>\n\n\n\n<p>\u010eal\u0161ie sp\u00f4soby s\u00fa pop\u00edsan\u00e9 na str\u00e1nke <a href=\"https:\/\/www.jankafialka.sk\/?page_id=937\">Frekven\u010dn\u00e1 anal\u00fdza a substitu\u010dn\u00e9 \u0161ifry <\/a>.<\/p>\n\n\n\n<form method=\"post\" class=\"ram\"> Ako sa V\u00e1m p\u00e1\u010di t\u00e1to str\u00e1nka?\nPodarilo sa V\u00e1m n\u00e1js\u0165 zauj\u00edmav\u00fd k\u013e\u00fa\u010d a k nemu opa\u010dn\u00fd k\u013e\u00fa\u010d? Pode\u013ete sa.<br>\n<input type=\"hidden\" name=\"stranka\" value=\"sifry\">\nMeno: <textarea rows=\"1\" name=\"meno\"><\/textarea><br>\nKoment\u00e1r: <br><textarea rows=\"6\" style=\"width : 100%\" name=\"obsah\"><\/textarea><br>\n<input type=\"submit\" name=\"odosli\" value=\"Odo\u0161li\">\n<\/form>\n\n\n\n\n<h3 class=\"wp-block-heading\">Koment\u00e1re<\/h3>\n\n\n<table><tr><td>Tammie<\/td><td>Large boobs that can be perky or droopy, depending on your choice, make up European MILFs \\'more mature bodies than your common MILF.http:\/\/nudespics.com If you like it shaggy, they\\'ve got you covered because they don\\'t do a lot of shaving. These women enjoy praising their younger colleagues because their spouses may not be up to the task. They have experience and are adept at keeping items exciting in base. They are prepared for it, whether you choose to consider cost or to let them take the reins. Their wimps are also scrumptious and set to take some action. Don\\'t fret about your particular passion; only enjoy the trip with these European women. They\\'ll make sure you\\'re as satisfied as achievable.<\/td><\/tr><tr><td>Tammie<\/td><td>Large boobs that can be perky or droopy, depending on your choice, make up European MILFs \\'more mature bodies than your common MILF.http:\/\/nudespics.com If you like it shaggy, they\\'ve got you covered because they don\\'t do a lot of shaving. These women enjoy praising their younger colleagues because their spouses may not be up to the task. They have experience and are adept at keeping items exciting in base. They are prepared for it, whether you choose to consider cost or to let them take the reins. Their wimps are also scrumptious and set to take some action. Don\\'t fret about your particular passion; only enjoy the trip with these European women. They\\'ll make sure you\\'re as satisfied as achievable.<\/td><\/tr><tr><td>Majka<\/td><td>vynikaj\u00face<\/td><\/tr><tr><td>Nikolaj<\/td><td>WoW<\/td><\/tr><tr><td>Jozef<\/td><td>Nice<\/td><\/tr><tr><td>J<\/td><td>Opa\u010dn\u00e9 k\u013e\u00fa\u010de: psina a lisna. :)<\/td><\/tr><\/table>\n","protected":false},"excerpt":{"rendered":"<p>Prv\u00e9 \u0161ifry vznikli za \u010dias d\u00e1vno minul\u00fdch, kedy spr\u00e1vy nosili poslovia. U\u017e vtedy vyvstal probl\u00e9m, ako zabezpe\u010di\u0165, aby si spr\u00e1vu nepre\u010d\u00edtal niekto in\u00fd ne\u017e adres\u00e1t. To sa dalo zaisti\u0165 r\u00f4zne, napr\u00edklad pou\u017eit\u00edm vosku a kr\u00e1\u013eovskej pe\u010date. Tak\u00e1 pe\u010da\u0165 na liste je fajn, ale \u0161ifrovanie spr\u00e1vy e\u0161te lep\u0161ie. C\u00e9zarova \u0161ifra Jednou z najstar\u0161\u00edch zn\u00e1mych \u0161ifier je [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":925,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-777","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u0160ifry - jankafialka<\/title>\n<meta name=\"description\" content=\"Str\u00e1nka obsahuje aplik\u00e1ciu, ktorou m\u00f4\u017eeme za\u0161ifrova\u0165 aj od\u0161ifrova\u0165 spr\u00e1vu pomocou C\u00e9zarovej a Vigen\u00e8rovej \u0161ifry.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jankafialka.sk\/?page_id=777\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0160ifry - 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