{"id":5916,"date":"2025-11-09T00:00:00","date_gmt":"2025-11-08T22:00:00","guid":{"rendered":"https:\/\/elmeistrai.lt\/?p=5916"},"modified":"2025-10-07T14:56:20","modified_gmt":"2025-10-07T11:56:20","slug":"nfc-technologijos-artimojo-lauko-rysys","status":"publish","type":"post","link":"https:\/\/elmeistrai.lt\/pl\/nfc-technologijos-artimojo-lauko-rysys\/","title":{"rendered":"NFC technologijos artimojo lauko ry\u0161ys"},"content":{"rendered":"

Kai telefonas tampa raktu, pinigine ir dar daugiau<\/h2>\n\n\n\n

Prisimenu, kaip prie\u0161 kok\u012f de\u0161imtmet\u012f \u017emon\u0117s \u017ei\u016br\u0117jo \u012f mane kaip \u012f keistuol\u012f, kai band\u017eiau paai\u0161kinti, kad ateityje mok\u0117sime telefonu tiesiog j\u012f prid\u0117dami prie kasos aparato. Dabar tai kasdienyb\u0117 \u2013 NFC technologija nepastebimai \u012fsiliejo \u012f m\u016bs\u0173 gyvenim\u0105. Bet kiek i\u0161 m\u016bs\u0173 tikrai supranta, kaip veikia tas \u201emagi\u0161kas” ry\u0161ys tarp dviej\u0173 prietais\u0173?<\/p>\n\n\n\n

NFC arba Near Field Communication \u2013 tai artimojo lauko ry\u0161io technologija, leid\u017eianti dviem \u012frenginiams keistis informacija labai ma\u017eu atstumu, paprastai iki 4 centimetr\u0173. Tai tarsi labai trumpo nuotolio belaidis ry\u0161ys, kuris veikia tik tada, kai prietaisai yra beveik susilie\u010diantys. Ir b\u016btent \u0161is trumpumas yra vienas did\u017eiausi\u0173 privalum\u0173 \u2013 juk niekas negali nuskaityti j\u016bs\u0173 mok\u0117jimo kortel\u0117s duomen\u0173 i\u0161 kito kambario ar net i\u0161 keli\u0173 metr\u0173 atstumo.<\/p>\n\n\n\n

Kaip dvi magnetin\u0117s rit\u0117s sukuria ry\u0161\u012f<\/h2>\n\n\n\n

Techninis NFC veikimo principas i\u0161 tikro n\u0117ra toks sud\u0117tingas, kaip gal\u0117tum\u0117te pagalvoti. Viskas sukasi aplink elektromagnetin\u012f indukcij\u0105 \u2013 t\u0105 pat\u012f princip\u0105, kuris veikia belaid\u017eiuose \u012fkrovikliuose ar senose transformatoriuose.<\/p>\n\n\n\n

Kiekviename NFC \u012frenginyje yra ma\u017ea antena \u2013 i\u0161 esm\u0117s tai tiesiog vario viela suvyniota \u012f rit\u0119. Kai vienas \u012frenginys (pavyzd\u017eiui, j\u016bs\u0173 telefonas) nori perduoti duomenis, jis sukuria kintam\u0105 magnetin\u012f lauk\u0105 aplink savo anten\u0105. \u0160is laukas veikia kaip nematomas tiltas tarp dviej\u0173 prietais\u0173.<\/p>\n\n\n\n

\u012edomiausia tai, kad NFC gali veikti dviem re\u017eimais. Aktyvusis re\u017eimas \u2013 kai abu \u012frenginiai turi savo maitinimo \u0161altin\u012f ir gali generuoti elektromagnetin\u012f lauk\u0105. Pasyvusis re\u017eimas \u2013 kai vienas \u012frenginys (pavyzd\u017eiui, mok\u0117jimo kortel\u0117 ar NFC \u017eyma) neturi baterijos, bet gauna energij\u0105 i\u0161 kito \u012frenginio magnetinio lauko. B\u016btent tod\u0117l j\u016bs\u0173 bekontakt\u0117 banko kortel\u0117 veikia net netur\u0117dama jokio maitinimo \u0161altinio!<\/p>\n\n\n\n

Duomen\u0173 perdavimas vyksta 13.56 MHz da\u017eniu, o greitis siekia nuo 106 iki 424 kilobit\u0173 per sekund\u0119. Tai n\u0117ra greitai, palyginus su WiFi ar Bluetooth, bet NFC ir n\u0117ra skirtas dideliems duomen\u0173 kiekiams perduoti. Jis sukurtas greitiems, paprastiems ir saugiems duomen\u0173 mainams.<\/p>\n\n\n\n

Nuo Japonijos traukini\u0173 iki pasaulin\u0117s revoliucijos<\/h2>\n\n\n\n

NFC istorija prasid\u0117jo ne vakar. Technologijos \u0161aknys siekia RFID (radijo da\u017eni\u0173 identifikavimo) sistemas, kurios buvo naudojamos dar Antrojo pasaulinio karo metu l\u0117ktuvams identifikuoti. Ta\u010diau modernus NFC gim\u0117 2002 metais, kai Sony ir Philips bendradarbiavo kurdami nauj\u0105 standart\u0105.<\/p>\n\n\n\n

Japonija buvo pirmoji \u0161alis, kur NFC technologija (ten vadinama FeliCa) tapo masiniu rei\u0161kiniu. Jau 2004 metais japonai naudojo telefonus vie\u0161ojo transporto bilietams pirkti ir net parduotuv\u0117se atsiskaityti. Vakar\u0173 pasaulis \u012f \u0161i\u0105 technologij\u0105 \u017ei\u016br\u0117jo skepti\u0161kai dar kelet\u0105 met\u0173.<\/p>\n\n\n\n

L\u016b\u017eis \u012fvyko 2011 metais, kai Google pristat\u0117 Google Wallet \u2013 pirm\u0105j\u0105 rimt\u0105 mobili\u0173j\u0173 mok\u0117jim\u0173 platform\u0105. Nors i\u0161 prad\u017ei\u0173 ji nebuvo labai populiari, tai atv\u0117r\u0117 keli\u0105 Apple Pay, Samsung Pay ir kitoms sistemoms. Kai 2014 metais Apple \u012fdieg\u0117 NFC \u012f iPhone 6, technologija pagaliau tapo masin\u0117.<\/p>\n\n\n\n

Dabar NFC rasite beveik kiekviename i\u0161maniajame telefone, i\u0161skyrus pa\u010dius pigiausius modelius. Tai tapo standartu, o ne privalumu.<\/p>\n\n\n\n

Trys NFC veikimo b\u016bdai praktikoje<\/h2>\n\n\n\n

NFC technologija gali veikti trimis skirtingais re\u017eimais, ir kiekvienas j\u0173 turi savo panaudojimo atvejus.<\/p>\n\n\n\n

Skaitytuvo\/ra\u0161ytuvo re\u017eimas<\/b> \u2013 \u010dia j\u016bs\u0173 telefonas veikia kaip aktyvus skaitytuvs, o kitas \u012frenginys yra pasyvi \u017eyma. Pavyzd\u017eiui, kai pridedate telefon\u0105 prie NFC \u017eymos restorane, kad perskaitytum\u0117te meniu, arba prie muziejaus eksponato, kad gautum\u0117te daugiau informacijos. \u017dyma neturi jokios baterijos \u2013 ji gauna energij\u0105 i\u0161 j\u016bs\u0173 telefono magnetinio lauko ir atsiun\u010dia atgal saugom\u0105 informacij\u0105.<\/p>\n\n\n\n

Peer-to-peer re\u017eimas<\/b> \u2013 abu \u012frenginiai yra aktyv\u016bs ir gali keistis duomenimis abiem kryptimis. Tai naudojama, kai norite perduoti nuotrauk\u0105 ar kontakt\u0105 kitam telefonui tiesiog juos susilietus. Android \u012frenginiai turi \u201eAndroid Beam” funkcij\u0105 b\u016btent \u0161iam tikslui (nors ji pama\u017eu kei\u010diama \u012f kit\u0173 technologij\u0173 derin\u012f).<\/p>\n\n\n\n

Kortel\u0117s emuliavimo re\u017eimas<\/b> \u2013 j\u016bs\u0173 telefonas apsimeta es\u0105s bekontakt\u0117 kortel\u0117. B\u016btent taip veikia Apple Pay, Google Pay ir kitos mobili\u0173j\u0173 mok\u0117jim\u0173 sistemos. J\u016bs\u0173 telefonas elgiasi kaip virtuali kredito kortel\u0117, ir mok\u0117jimo terminalas \u201emato” j\u012f kaip \u012fprast\u0105 bekontakt\u0119 kortel\u0119.<\/p>\n\n\n\n

Saugumas: ar tikrai reikia bijoti vagi\u0173 su skaitytuvais?<\/h2>\n\n\n\n

Vienas da\u017eniausi\u0173 klausim\u0173, kuriuos gird\u017eiu: ar kas nors gali nuskaityti mano kortel\u0117s duomenis metro traukinyje ar perpildytoje parduotuv\u0117je? Trumpas atsakymas \u2013 teori\u0161kai taip, prakti\u0161kai beveik ne\u012fmanoma.<\/p>\n\n\n\n

Pirma, atstumas. NFC veikia tik iki 4 centimetr\u0173, o realyb\u0117je patikimas ry\u0161ys da\u017enai reikalauja dar ma\u017eesnio atstumo. Vagis tur\u0117t\u0173 b\u016bti tikrai arti su specialiu \u012frenginiu, ir j\u016bs grei\u010diausiai tai pasteb\u0117tum\u0117te.<\/p>\n\n\n\n

Antra, \u0161iuolaikin\u0117s mok\u0117jimo kortel\u0117s ir telefonai naudoja tokenizacij\u0105. Tai rei\u0161kia, kad perduodami ne tikri j\u016bs\u0173 kortel\u0117s duomenys, o laikinas vienkartinis kodas (tokenas). Net jei kas nors j\u012f pergrobt\u0173, jis b\u016bt\u0173 nenaudingas kitam mok\u0117jimui. Kiekvien\u0105 kart\u0105 generuojamas naujas kodas.<\/p>\n\n\n\n

Tre\u010dia, daugelis mok\u0117jimo sistem\u0173 reikalauja autentifikacijos didesn\u0117ms sumoms. Jei bandote sumok\u0117ti daugiau nei 25-50 eur\u0173 (priklausomai nuo \u0161alies), reik\u0117s \u012fvesti PIN kod\u0105 arba naudoti biometrin\u0119 autentifikacij\u0105 telefone.<\/p>\n\n\n\n

Vis d\u0117lto, jei esate itin atsarg\u016bs, galite \u012fsigyti RFID blokuojan\u010di\u0105 pinigin\u0119. Jos viduje yra metalizuota med\u017eiaga, kuri blokuoja radijo bangas. Bet s\u0105\u017einingai \u2013 tikimyb\u0117 tapti tokios atakos auka yra ma\u017eesn\u0117 nei b\u016bti trenktiems \u017eaibo.<\/p>\n\n\n\n

Kur dar naudojamas NFC be mok\u0117jim\u0173<\/h2>\n\n\n\n

Nors daugelis \u017emoni\u0173 NFC asocijuoja tik su mok\u0117jimais, technologijos panaudojimas yra daug platesnis ir \u012fdomesnis.<\/p>\n\n\n\n

Vie\u0161asis transportas<\/b> \u2013 daugelyje miest\u0173 galite naudoti telefon\u0105 ar speciali\u0105 kortel\u0119 kaip biliet\u0105. Vilniuje tai \u201eVilnie\u010dio kortel\u0117”, Londone \u2013 \u201eOyster card”. Tiesiog pridedate kortel\u0119 ar telefon\u0105 prie skaitytuvo, ir sistema automati\u0161kai nuskai\u010diuoja kelion\u0117s kain\u0105.<\/p>\n\n\n\n

Prieigos kontrol\u0117<\/b> \u2013 vis daugiau vie\u0161bu\u010di\u0173, biur\u0173 ir net nam\u0173 naudoja NFC raktelius. U\u017euot dalinus fizines raktas, galite gauti virtual\u0173 rakt\u0105 savo telefone. Praradote telefon\u0105? Administratorius gali akimirksniu at\u0161aukti prieig\u0105, ko negalima padaryti su fiziniais raktais.<\/p>\n\n\n\n

Produkt\u0173 autenti\u0161kumo tikrinimas<\/b> \u2013 kai kurios prabangi\u0173 preki\u0173 kompanijos \u012fdeda NFC \u017eymas \u012f savo produktus. Prid\u0117j\u0119 telefon\u0105, galite patikrinti, ar produktas tikrai autenti\u0161kas, pamatyti jo gamybos istorij\u0105 ir net gauti specialaus turinio.<\/p>\n\n\n\n

Sveikatos prie\u017ei\u016bra<\/b> \u2013 kai kurie gliukoz\u0117s matuokliai diabetikams naudoja NFC technologij\u0105. Pacientas prideda telefon\u0105 prie sensoriaus ant odos ir akimirksniu gauna gliukoz\u0117s lygio duomenis be joki\u0173 adat\u0173 ar kraujo la\u0161\u0173.<\/p>\n\n\n\n

I\u0161manieji namai<\/b> \u2013 NFC \u017eymos gali b\u016bti naudojamos automatizacijai. Pavyzd\u017eiui, prid\u0117jus telefon\u0105 prie \u017eymos ant nakties stalelio, gali automati\u0161kai \u012fsijungti \u201emiego re\u017eimas” \u2013 i\u0161sijungia visi garsai, suma\u017e\u0117ja ekrano ry\u0161kumas, nustatomas \u017eadintuvas.<\/p>\n\n\n\n

Kaip patys galite naudoti NFC \u017eymas<\/h2>\n\n\n\n

Vienas \u012fdomiausi\u0173 dalyk\u0173 apie NFC \u2013 galite pirkti tu\u0161\u010dias NFC \u017eymas u\u017e kelis eurus ir jas u\u017eprogramuoti patys. Jos atrodo kaip ma\u017ei lipdukai ar rakt\u0173 pakabukai.<\/p>\n\n\n\n

Galite u\u017eprogramuoti \u017eym\u0105, kad ji:
– \u012ejungt\u0173 WiFi ir automati\u0161kai prisijungt\u0173 prie j\u016bs\u0173 nam\u0173 tinklo (puiku sve\u010diams)
– Paleist\u0173 navigacij\u0105 \u012f darb\u0105, kai ryte s\u0117date \u012f automobil\u012f
– I\u0161si\u0173st\u0173 i\u0161 anksto paruo\u0161t\u0105 SMS \u017einut\u0119 (\u201eJau beveik namie!”)
– Atidaryt\u0173 konkret\u0173 interneto puslap\u012f ar program\u0105
– Pakeist\u0173 telefono nustatymus (garsum\u0105, ry\u0161kum\u0105, re\u017eim\u0105)<\/p>\n\n\n\n

Programuoti jas labai paprasta. Android telefonuose galite naudoti nemokamas programas kaip \u201eNFC Tools” ar \u201eTrigger”. Tiesiog atidarote program\u0105, pasirenkate, k\u0105 norite, kad \u017eyma daryt\u0173, ir pridedate prie jos telefon\u0105 \u2013 viskas u\u017eprogramuojama per kelias sekundes.<\/p>\n\n\n\n

A\u0161 asmeni\u0161kai turiu NFC \u017eym\u0105 ant darbo stalo, kuri automati\u0161kai \u012fjungia \u201enetrukdyti” re\u017eim\u0105 ir paleid\u017eia produktyvumo laikmat\u012f. Kita \u017eyma prie dur\u0173 i\u0161jungia visus nereikalingus ry\u0161ius ir \u012fjungia energijos taupymo re\u017eim\u0105, kai i\u0161einu i\u0161 nam\u0173.<\/p>\n\n\n\n

Ateitis: NFC evoliucija ir naujos galimyb\u0117s<\/h2>\n\n\n\n

NFC technologija n\u0117ra statin\u0117 \u2013 ji nuolat tobul\u0117ja. Naujausias standartas leid\u017eia didesn\u012f duomen\u0173 perdavimo greit\u012f ir \u0161iek tiek didesn\u012f veikimo atstum\u0105. Bet svarbiausia ne techniniai parametrai, o nauji panaudojimo b\u016bdai.<\/p>\n\n\n\n

Automobili\u0173 pramon\u0117 aktyviai integruoja NFC. Kai kurie nauji automobiliai leid\u017eia naudoti telefon\u0105 kaip rakt\u0105 \u2013 tiesiog pridedate telefon\u0105 prie dur\u0173 rankenos, ir automobilis atsidaro. Dar \u012fdomiau, kad galite dalintis virtualiais raktais su draugais ar \u0161eimos nariais per program\u0105.<\/p>\n\n\n\n

Ma\u017emenin\u0117 prekyba eksperimentuoja su \u201epaliesti ir pirkti” koncepcija. \u012esivaizduokite, kad parduotuv\u0117je matote patikus\u012f produkt\u0105, pridedate prie jo telefon\u0105 ir jis automati\u0161kai pridedamas \u012f krep\u0161el\u012f. I\u0161eidami tiesiog patvirtinate pirkim\u0105 \u2013 joki\u0173 eili\u0173 prie kasos.<\/p>\n\n\n\n

Medicinos srityje NFC gali b\u016bti naudojamas vaist\u0173 pakuot\u0117se. Prid\u0117jus telefon\u0105, gautum\u0117te priminimus kada vartoti vaist\u0105, informacij\u0105 apie galimus \u0161alutinius poveikius ir net gal\u0117tum\u0117te prane\u0161ti apie problemas tiesiogiai vaist\u0173 gamintojui.<\/p>\n\n\n\n

Kai technologija tampa nematomu pagalbininku<\/h2>\n\n\n\n

Gr\u012f\u017etant prie prad\u017eios \u2013 NFC yra viena i\u0161 t\u0173 technologij\u0173, kurios dirba geriausiai, kai j\u0173 visai nepastebime. Nereikia joki\u0173 sud\u0117ting\u0173 nustatym\u0173, por\u0173 k\u016brimo ar laukimo. Tiesiog pridedate du \u012frenginius \u2013 ir viskas veikia.<\/p>\n\n\n\n

Tai puikus pavyzdys, kaip technologija tur\u0117t\u0173 tarnauti \u017emogui, o ne atvirk\u0161\u010diai. Nereikia b\u016bti technologij\u0173 guru, kad sumok\u0117tum\u0117te telefonu ar nuskaitytum\u0117te informacij\u0105 i\u0161 i\u0161maniosios etiket\u0117s. Tai intuityvus judesys \u2013 prid\u0117ti ir palaukti sekund\u0119.<\/p>\n\n\n\n

\u017dinoma, NFC n\u0117ra tobula technologija. Ji l\u0117ta dideliems duomen\u0173 kiekiams, veikia tik labai ma\u017eu atstumu (nors tai ir privalumas saugumo po\u017ei\u016briu), ir ne visi \u012frenginiai j\u0105 palaiko. Bet savo ni\u0161oje \u2013 greituose, paprastuose ir saugiuose duomen\u0173 mainuose \u2013 ji veikia puikiai.<\/p>\n\n\n\n

Ar verta r\u016bpintis NFC palaikymu perkant nauj\u0105 telefon\u0105? Absoliu\u010diai taip. Net jei dabar nesinaudojate mobiliaisiais mok\u0117jimais ar i\u0161maniosiomis \u017eymomis, grei\u010diausiai prad\u0117site ateityje. Ir kai tas momentas ateis, b\u016bsite d\u0117kingi, kad j\u016bs\u0173 telefonas turi \u0161i\u0105 funkcij\u0105. Nes kai \u012fprantate mok\u0117ti telefonu ar atidaryti duris juo, gr\u012f\u017eti prie plastikini\u0173 korteli\u0173 ir metalini\u0173 rakt\u0173 tampa tikrai sunku.<\/p>","protected":false},"excerpt":{"rendered":"

Kai telefonas tampa raktu, pinigine ir dar daugiau Prisimenu, kaip prie\u0161 kok\u012f de\u0161imtmet\u012f \u017emon\u0117s \u017ei\u016br\u0117jo \u012f mane kaip \u012f keistuol\u012f,…<\/p>","protected":false},"author":1,"featured_media":5915,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[7],"tags":[],"class_list":["post-5916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kompiuteriu-remontas-kompiuteriai-naujienos-patarimai","wpcat-7-id"],"yoast_head":"\nNFC technologijos artimojo lauko ry\u0161ys<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/elmeistrai.lt\/pl\/nfc-technologijos-artimojo-lauko-rysys\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" 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