{"id":1800,"date":"2026-07-21T09:30:00","date_gmt":"2026-07-21T09:30:00","guid":{"rendered":"https:\/\/potenting.com\/fi\/blog\/what-is-ssl\/"},"modified":"2026-09-28T17:51:37","modified_gmt":"2026-09-28T17:51:37","slug":"what-is-ssl-fi","status":"publish","type":"post","link":"https:\/\/potenting.com\/fi\/blog\/what-is-ssl\/","title":{"rendered":"Mik\u00e4 on SSL ja miten se parantaa verkkosivuston tietoturvaa?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1800\" class=\"elementor elementor-1800\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1395674 e-flex e-con-boxed e-con e-parent\" data-id=\"1395674\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c774f74 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"c774f74\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;T\\u00e4lt\\u00e4 sivulta ei l\\u00f6ytynyt otsikoita.&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<div class=\"elementor-toc__header-title\">\n\t\t\t\tSis\u00e4llysluettelo\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__c774f74\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__c774f74\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__c774f74\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-419b78e e-flex e-con-boxed e-con e-parent\" data-id=\"419b78e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-979d978 elementor-widget elementor-widget-text-editor\" data-id=\"979d978\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Tietoturva on nykyp\u00e4iv\u00e4n liiketoiminnan perusta. Organisaatiot ja yritykset etsiv\u00e4t jatkuvasti ratkaisuja, joilla ne voivat parantaa tietoturvaansa ja kokonaissuorituskyky\u00e4\u00e4n. Yksi t\u00e4rkeimmist\u00e4 toimenpiteist\u00e4, joihin niiden tulisi suhtautua vakavasti, on SSL-varmenteen k\u00e4ytt\u00f6\u00f6notto \u2013 luotettava ratkaisu tietoturvan vahvistamiseen verkossa.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dcd3d8f e-flex e-con-boxed e-con e-parent\" data-id=\"dcd3d8f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e3d772b elementor-widget elementor-widget-text-editor\" data-id=\"e3d772b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Mik\u00e4 on SSL-varmenne?<\/h2>\n<p>SSL on tietojen salausprotokolla, joka suojaa k\u00e4ytt\u00e4j\u00e4n ja verkkosivuston v\u00e4lisen yhteyden. Kun verkkosivustolla on SSL-varmenne, sen URL-osoitteen viereen ilmestyy riippulukon kuvake. Kuvake osoittaa, ett\u00e4 k\u00e4ytt\u00e4j\u00e4n ja sivuston v\u00e4linen viestint\u00e4 kulkee suojatun yhteyden kautta. N\u00e4in kaikki k\u00e4ytt\u00e4j\u00e4n ja palvelimen v\u00e4lill\u00e4 vaihdettavat tiedot on suojattu salakuuntelulta, peukaloinnilta ja luvattomilta muutoksilta.<\/p>\n<p>Tietojen salaus toimii jakamalla tiedot pieniin paketteihin ja muuntamalla ne lukukelvottomaan muotoon salausalgoritmien avulla. Vaikka hakkerit onnistuisivat sieppaamaan tiedot, he eiv\u00e4t voi lukea tai hy\u00f6dynt\u00e4\u00e4 niit\u00e4 ilman oikeaa salausavainta ja algoritmia. K\u00e4sittelemme my\u00f6hemmin, miten vastaanottaja purkaa n\u00e4iden tietojen salauksen.<\/p>\n<p>SSL:n ensimm\u00e4isest\u00e4 julkaisusta kuluneiden 25 vuoden aikana protokollasta on julkaistu useita versioita. Monista niist\u00e4 on kuitenkin lopulta luovuttu tietoturvahaavoittuvuuksien vuoksi. T\u00e4m\u00e4 johti TLS:n (Transport Layer Security) kehitt\u00e4miseen. TLS tarjoaa huomattavasti vahvemman tietoturvan, ja se on nyky\u00e4\u00e4n korvannut SSL:n. Muutoksesta huolimatta tekniikkaa kutsutaan yh\u00e4 yleisesti SSL:ksi, mink\u00e4 vuoksi termi tunnetaan edelleen laajalti.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" class=\"e-image-base e-default-img e-3f20e57-da80088\" data-interaction-id=\"3f20e57\" data-e-type=\"widget\" data-id=\"3f20e57\" id=\"552\" src=\"https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SSL-Certificate.webp\" width=\"600\" height=\"400\" srcset=\"https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SSL-Certificate.webp 600w, https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SSL-Certificate-300x200.webp 300w\" alt=\"What Is an SSL Certificate\"\/>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-99e48c5 e-flex e-con-boxed e-con e-parent\" data-id=\"99e48c5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-17f007c elementor-widget elementor-widget-text-editor\" data-id=\"17f007c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Miten SSL toimii?<\/h2><p>SSL on suunniteltu varmistamaan, ett\u00e4 k\u00e4ytt\u00e4j\u00e4n ja palvelimen v\u00e4lill\u00e4 vaihdettavat tiedot pysyv\u00e4t turvassa. T\u00e4m\u00e4 tapahtuu salausalgoritmeilla, jotka muuntavat tiedot lukukelvottomaan muotoon ja est\u00e4v\u00e4t asiattomia p\u00e4\u00e4sem\u00e4st\u00e4 niihin k\u00e4siksi. T\u00e4st\u00e4 her\u00e4\u00e4 kuitenkin t\u00e4rke\u00e4 kysymys: miten salattu tieto luetaan m\u00e4\u00e4r\u00e4np\u00e4\u00e4ss\u00e4\u00e4n?<\/p><p>Tietojen salaus puretaan kahden salausavaimen avulla.<\/p><p>Ennen n\u00e4iden kahden avaimen k\u00e4sittely\u00e4 on hyv\u00e4 ymm\u00e4rt\u00e4\u00e4, mik\u00e4 avain on. Salausavain on kirjaimista ja numeroista koostuva merkkijono, jota k\u00e4ytet\u00e4\u00e4n tietojen salaamiseen ja salauksen purkamiseen. SSL:ss\u00e4 on kahdenlaisia avaimia: julkinen avain (Public Key) ja yksityinen avain (Private Key).<\/p><p>Kun selain muodostaa yhteyden verkkosivustoon, se k\u00e4ytt\u00e4\u00e4 julkista avainta. T\u00e4m\u00e4 avain on julkisesti saatavilla, ja sen avulla muodostetaan suojattu yhteys.<\/p><p>Yksityinen avain puolestaan on tallennettu ainoastaan palvelimelle, eik\u00e4 sit\u00e4 jaeta kenellek\u00e4\u00e4n. Sill\u00e4 on keskeinen rooli salattujen tietojen purkamisessa \u2013 ilman sit\u00e4 tiedot pysyv\u00e4t lukukelvottomina. T\u00e4m\u00e4n vuoksi yksityisen avaimen suojaaminen on \u00e4\u00e4rimm\u00e4isen t\u00e4rke\u00e4\u00e4. Jos se joskus vaarantuu, asiattomat henkil\u00f6t voivat k\u00e4ytt\u00e4\u00e4 sit\u00e4 arkaluonteisten tietojen salauksen purkamiseen ja p\u00e4\u00e4st\u00e4 k\u00e4siksi luottamuksellisiin tietoihin.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9c11fcc e-flex e-con-boxed e-con e-parent\" data-id=\"9c11fcc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0b85751 elementor-widget elementor-widget-text-editor\" data-id=\"0b85751\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Riitt\u00e4\u00e4k\u00f6 SSL-varmenne takaamaan tietoturvan?<\/h2>\n<p>Ei. Vaikka kyberturvallisuusteknologiat ovat kehittyneet merkitt\u00e4v\u00e4sti, my\u00f6s kyberhy\u00f6kk\u00e4ykset kehittyv\u00e4t jatkuvasti. SSL ei yksin\u00e4\u00e4n pysty takaamaan verkkosivuston t\u00e4ydellist\u00e4 tietoturvaa, mutta se voi suojata sivustoja merkitt\u00e4v\u00e4sti monenlaisilta hy\u00f6kk\u00e4yksilt\u00e4.<\/p>\n<p>SSL-suojauksen parantamiseksi on t\u00e4rke\u00e4\u00e4 noudattaa seuraavia ohjeita:<\/p>\n<ul>\n<li> Pid\u00e4 SSL-varmenteesi aina ajan tasalla ja k\u00e4yt\u00e4 uudempia, turvallisempia versioita.<\/li>\n<li> Hanki SSL-varmenteesi luotetulta ja luotettavalta varmentajalta.<\/li>\n<li>\u00c4l\u00e4 koskaan miss\u00e4\u00e4n olosuhteissa jaa yksityist\u00e4 avaintasi kenellek\u00e4\u00e4n, sill\u00e4 sen paljastuminen voi vaarantaa salattujen tietojen turvallisuuden.<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d41cfeb e-flex e-con-boxed e-con e-parent\" data-id=\"d41cfeb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-648fe40 elementor-widget elementor-widget-text-editor\" data-id=\"648fe40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Mik\u00e4 on HTTPS?<\/h2><p>Jos verkkosivustolla on SSL-varmenne, sen URL-osoitteen alussa n\u00e4kyy HTTPS. Lis\u00e4ksi selain n\u00e4ytt\u00e4\u00e4 riippulukon kuvakkeen sivuston osoitteen vieress\u00e4. N\u00e4iden merkkien avulla k\u00e4ytt\u00e4jille osoitetaan, ett\u00e4 sivusto on turvallinen ja luotettava.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c50852b e-flex e-con-boxed e-con e-parent\" data-id=\"c50852b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-87861b5 elementor-widget elementor-widget-text-editor\" data-id=\"87861b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Onko SSL-varmenne v\u00e4ltt\u00e4m\u00e4t\u00f6n?<\/h2><p>Kyll\u00e4. Jos verkkosivustollasi ei ole SSL-varmennetta, selaimet n\u00e4ytt\u00e4v\u00e4t k\u00e4ytt\u00e4jille varoituksen siit\u00e4, ett\u00e4 sivusto ei ole turvallinen. T\u00e4m\u00e4 voi heikent\u00e4\u00e4 k\u00e4ytt\u00e4jien luottamusta ja saada monet k\u00e4vij\u00e4t poistumaan sivustolta.<\/p><p>Lis\u00e4ksi sivustot, joilla ei ole SSL-varmennetta, voivat sijoittua hakukoneiden, kuten Googlen, tuloksissa turvallisia sivustoja heikommin.<\/p><p>Saatat ajatella, ettei sivustosi k\u00e4sittele arkaluonteisia tai luottamuksellisia tietoja, mutta SSL-varmenne on silti v\u00e4ltt\u00e4m\u00e4t\u00f6n. Ilman SSL-suojausta hakkerit voivat p\u00e4\u00e4st\u00e4 k\u00e4siksi tiedonsiirtoon ja esimerkiksi lis\u00e4t\u00e4 ei-toivottuja mainoksia, muokata sivuston sis\u00e4lt\u00f6\u00e4 tai ohjata k\u00e4ytt\u00e4ji\u00e4 haitallisille sivuille.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-439dbe7 e-flex e-con-boxed e-con e-parent\" data-id=\"439dbe7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7ead1de elementor-widget elementor-widget-text-editor\" data-id=\"7ead1de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Lopuksi<\/h2><p>Nykyp\u00e4iv\u00e4n digitaalisessa maailmassa tietoturva ei ole en\u00e4\u00e4 valinta vaan v\u00e4ltt\u00e4m\u00e4tt\u00f6myys. SSL-varmenne on yksi t\u00e4rkeimmist\u00e4 ty\u00f6kaluista suojatun yhteyden muodostamiseen k\u00e4ytt\u00e4jien ja verkkosivustojen v\u00e4lille. Salaamalla tiedot t\u00e4m\u00e4 tekniikka suojaa k\u00e4ytt\u00e4jien tietoja ja lis\u00e4\u00e4 luottamusta sivustoon.<\/p><p>Vaikka SSL ei yksin\u00e4\u00e4n pysty poistamaan kaikkia tietoturvauhkia, sit\u00e4 pidet\u00e4\u00e4n yhten\u00e4 verkkoturvallisuuden peruselementeist\u00e4. Luotetun varmenteen k\u00e4ytt\u00e4minen, sen pit\u00e4minen ajan tasalla ja yksityisen avaimen suojaaminen ovat ratkaisevan t\u00e4rkeit\u00e4 sivuston tietoturvan yll\u00e4pit\u00e4misess\u00e4.<\/p><p>Loppujen lopuksi SSL-varmenne ei ole v\u00e4ltt\u00e4m\u00e4t\u00f6n ainoastaan k\u00e4ytt\u00e4j\u00e4tietojen suojaamiseksi, vaan my\u00f6s sivuston uskottavuuden parantamiseksi, k\u00e4ytt\u00e4jien luottamuksen lis\u00e4\u00e4miseksi ja turvallisemman verkkokokemuksen luomiseksi.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9de34d5 e-flex e-con-boxed e-con e-parent\" data-id=\"9de34d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-1b0602f e-con-full e-flex e-con e-child\" data-id=\"1b0602f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-45140ef elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"45140ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-question-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 448c-110.532 0-200-89.431-200-200 0-110.495 89.472-200 200-200 110.491 0 200 89.471 200 200 0 110.53-89.431 200-200 200zm107.244-255.2c0 67.052-72.421 68.084-72.421 92.863V300c0 6.627-5.373 12-12 12h-45.647c-6.627 0-12-5.373-12-12v-8.659c0-35.745 27.1-50.034 47.579-61.516 17.561-9.845 28.324-16.541 28.324-29.579 0-17.246-21.999-28.693-39.784-28.693-23.189 0-33.894 10.977-48.942 29.969-4.057 5.12-11.46 6.071-16.666 2.124l-27.824-21.098c-5.107-3.872-6.251-11.066-2.644-16.363C184.846 131.491 214.94 112 261.794 112c49.071 0 101.45 38.304 101.45 88.8zM298 368c0 23.159-18.841 42-42 42s-42-18.841-42-42 18.841-42 42-42 42 18.841 42 42z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-aa6b2ef e-con-full e-flex e-con e-child\" data-id=\"aa6b2ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e2860c9 elementor-widget elementor-widget-text-editor\" data-id=\"e2860c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Usein kysytyt kysymykset<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0f4c92 elementor-widget elementor-widget-text-editor\" data-id=\"b0f4c92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3>1. T\u00e4ytyyk\u00f6 SSL-varmenne uusia?<\/h3><p style=\"padding-left: 40px;\">Kyll\u00e4. SSL-varmenteilla on rajallinen voimassaoloaika, ja ne on uusittava tai vaihdettava ennen vanhenemista, jotta sivuston tietoturva s\u00e4ilyy.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1bb85b1 elementor-widget elementor-widget-text-editor\" data-id=\"1bb85b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3>2. Voiko SSL:n yksityisen avaimen jakaa muille?<\/h3><p style=\"padding-left: 40px;\">Ei. Yksityisen avaimen on pysytt\u00e4v\u00e4 t\u00e4ysin luottamuksellisena. Jos asiattomat henkil\u00f6t p\u00e4\u00e4sev\u00e4t siihen k\u00e4siksi, salatut tiedot voivat vaarantua.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1100163 elementor-widget elementor-widget-text-editor\" data-id=\"1100163\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3>3. Mik\u00e4 ero on SSL:ll\u00e4 ja TLS:ll\u00e4?<\/h3><p style=\"padding-left: 40px;\">TLS on SSL:n uudempi ja turvallisempi versio, joka otettiin k\u00e4ytt\u00f6\u00f6n vanhempien SSL-versioiden tietoturvaongelmien korjaamiseksi. Vaikka nyky\u00e4\u00e4n k\u00e4ytet\u00e4\u00e4n TLS:\u00e4\u00e4, monet kutsuvat t\u00e4t\u00e4 tekniikkaa edelleen SSL:ksi.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Tietoturva on nykyp\u00e4iv\u00e4n liiketoiminnan perusta. Organisaatiot ja yritykset etsiv\u00e4t jatkuvasti ratkaisuja, joilla ne voivat parantaa tietoturvaansa ja kokonaissuorituskyky\u00e4\u00e4n. Yksi t\u00e4rkeimmist\u00e4 toimenpiteist\u00e4, joihin niiden tulisi suhtautua vakavasti, on SSL-varmenteen k\u00e4ytt\u00f6\u00f6notto \u2013 luotettava ratkaisu tietoturvan vahvistamiseen verkossa. Mik\u00e4 on SSL-varmenne? SSL on tietojen salausprotokolla, joka suojaa k\u00e4ytt\u00e4j\u00e4n ja verkkosivuston v\u00e4lisen yhteyden. Kun verkkosivustolla on SSL-varmenne, sen URL-osoitteen [\u2026]<\/p>\n","protected":false},"author":7,"featured_media":556,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1800","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kattava SSL-opas: toiminta, HTTPS ja verkkoturvallisuus<\/title>\n<meta name=\"description\" content=\"Mik\u00e4 on SSL-varmenne? 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Opi, miten SSL toimii, miten HTTPS parantaa sivuston tietoturvaa ja miksi tietojen salaus on verkossa v\u00e4ltt\u00e4m\u00e4t\u00f6nt\u00e4.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/potenting.com\/fi\/blog\/what-is-ssl\/\" \/>\n<meta property=\"og:site_name\" content=\"Potenting Blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-21T09:30:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-28T17:51:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/potenting.com\/blog\/wp-content\/uploads\/2026\/07\/What-is-SSL.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"966\" \/>\n\t<meta property=\"og:image:height\" content=\"665\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Nina Ash\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nina Ash\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/\"},\"author\":{\"name\":\"Nina Ash\",\"@id\":\"https:\\\/\\\/potenting.com\\\/blog\\\/#\\\/schema\\\/person\\\/743a7b4616c4d55a0ed17f5ac379fcdb\"},\"headline\":\"Mik\u00e4 on SSL ja miten se parantaa verkkosivuston tietoturvaa?\",\"datePublished\":\"2026-07-21T09:30:00+00:00\",\"dateModified\":\"2026-09-28T17:51:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/\"},\"wordCount\":845,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/potenting.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/What-is-SSL.webp\",\"articleSection\":[\"Luokittelematon\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/\",\"url\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/\",\"name\":\"Kattava SSL-opas: toiminta, HTTPS ja verkkoturvallisuus\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/potenting.com\\\/fi\\\/blog\\\/what-is-ssl\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/potenting.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/What-is-SSL.webp\",\"datePublished\":\"2026-07-21T09:30:00+00:00\",\"dateModified\":\"2026-09-28T17:51:37+00:00\",\"description\":\"Mik\u00e4 on SSL-varmenne? 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