{"id":6878,"date":"2025-05-28T19:46:58","date_gmt":"2025-05-28T17:46:58","guid":{"rendered":"https:\/\/podpisano-new.local\/?p=6878"},"modified":"2025-05-29T00:59:44","modified_gmt":"2025-05-28T22:59:44","slug":"elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2","status":"publish","type":"post","link":"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/","title":{"rendered":"Electronic time stamp - what is it, how does it work and why should you use it? 1\/2"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"6878\" class=\"elementor elementor-6878\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dc68e6e e-con-full e-flex e-con e-child\" data-id=\"dc68e6e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-bb58e09 e-con-full e-flex e-con e-child\" data-id=\"bb58e09\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-de6c877 elementor-widget elementor-widget-heading\" data-id=\"de6c877\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Timestamps in digital trust services<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6178315 elementor-widget elementor-widget-text-editor\" data-id=\"6178315\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Electronic timestamping is a digital service that allows you to assign a precise date and time to electronic data such as documents, emails or files. <a href=\"https:\/\/podpisano.pl\/en\/uslugi-zaufania-cyfrowego-i-konserwacja-podpisu-kwalifikowanego\/\">This marker works on the principle of a digital time stamp<\/a>, unambiguously confirming the moment when the electronic information was created, sent or received.<\/span><\/p><p><span style=\"font-weight: 400;\">In this article, we explain what timestamping is and how it works, discuss its practical applications (including for electronic signatures, e-invoices, document archiving or electronic communications), present the benefits of its use, and point out situations in which the use of timestamping may be unnecessary. The whole is supplemented by current legal aspects related to time stamps - both EU (eIDAS regulation) and Polish national regulations on <a href=\"https:\/\/podpisano.pl\/en\/uslugi-zaufania-cyfrowego-klucz-do-bezpieczenstwa-w-sieci-kompletny-przewodnik\/\">qualified trust services<\/a>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc78597 elementor-widget elementor-widget-heading\" data-id=\"cc78597\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is an electronic time stamp?\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f86aa6c elementor-widget elementor-widget-text-editor\" data-id=\"f86aa6c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Electronic time stamp<\/b><span style=\"font-weight: 400;\"> is a special block of electronic data that links other data (e.g., a document, a file) to a specific point in time to provide evidence that the data existed at that point in time. In simpler terms, a time stamp acts as an electronic \u201edate and time stamp\u201d affixed to a document or file. <a href=\"https:\/\/podpisano.pl\/en\/uslugi-zaufania-cyfrowego-i-konserwacja-podpisu-kwalifikowanego\/\">This makes any subsequent change in content or attempted time manipulation detectable<\/a> - A time-stamped document cannot be secretly <\/span><b>antidated<\/b><span style=\"font-weight: 400;\"> (pre-dated to an earlier date) nor <\/span><b>post-dated<\/b><span style=\"font-weight: 400;\"> (marked with a date later than the actual date) without invalidating such a time signature.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In practice, time stamps are most often used <\/span><b>combined with an electronic signature or electronic seal<\/b><span style=\"font-weight: 400;\">. When a document is signed, a timestamp is added so that an independent, trusted third party can confirm the moment of signature. The important thing is that the timestamp <\/span><b>does not use the user's computer clock<\/b><span style=\"font-weight: 400;\">, which could be repositioned, but is based on the <\/span><b>reliable and independent source of time<\/b><span style=\"font-weight: 400;\"> synchronized with Coordinated Universal Time (UTC). The provider of such time is a qualified trust service provider (in Poland, for example. <\/span><a href=\"https:\/\/www.gum.gov.pl\/pl\/dla-biznesu\/uslugi\/zegar\/524,Zegar.html\"><span style=\"font-weight: 400;\">General Office of Weights and Measures<\/span><\/a><span style=\"font-weight: 400;\"> provides the official UTC time). The marker itself is in the form of a small file or data string that is <\/span><b>electronically signed<\/b><span style=\"font-weight: 400;\"> By the time service provider. Typically, an advanced electronic signature or seal of a qualified provider is used here, which guarantees the authenticity and integrity of the tag.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The result is electronic proof that the document in question existed and <\/span><b>has not been changed since it was time-stamped<\/b><span style=\"font-weight: 400;\">. A special category is <\/span><b>qualified electronic time stamp<\/b><span style=\"font-weight: 400;\">, that is, one that meets the requirements of the regulations (<\/span><span style=\"font-weight: 400;\">discussed in <a href=\"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-2-2\/\">second part of the article<\/a><\/span><span style=\"font-weight: 400;\"><a href=\"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-2-2\/\">)<\/a> and is issued by a qualified trust service provider. A qualified timestamp provides the highest level of trust - including time precision and strong cryptographic security - and is recognized in all European Union countries as equivalent (regardless of the country of issue).<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3070046 elementor-widget elementor-widget-heading\" data-id=\"3070046\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Examples of timestamp applications\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d610f1f elementor-widget elementor-widget-text-editor\" data-id=\"d610f1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Electronic time stamps have a wide range of applications wherever it is important to record the moment of creation or submission of a document. Here are the most important areas where this service is used:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Electronic signatures and digital contracts.<\/b><span style=\"font-weight: 400;\">\u00a0When concluding civil law contracts remotely or signing important documents electronically, the exact date and time of the signature is crucial. Affixing the signature <\/span><b>qualified time stamp<\/b><span style=\"font-weight: 400;\"> provides a guarantee and legally reliable proof that the document was signed at a precise moment. This is particularly important, for example, when dealing with banks or in tender proceedings, where time stamps are often required to secure the date when a bid was signed. For example, in public procurement in Poland, participants as of 2021 must submit bids using an e-signature; however, if the signature certificate expires during the evaluation of bids, only prior timestamping of the bid will allow it to be successfully verified after the certificate expires. The absence of a timestamp could result in the signature being invalidated after the certificate expires, so the use of timestamps has become the de facto standard in such situations.<\/span><\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Electronic invoices (e-invoicing).<\/b><span style=\"font-weight: 400;\">\u00a0In the circulation of digital invoices, it is important to confirm the date of issue and ensure the authenticity of the document's origin. In the past, it was common for PDF invoices to be stamped with a qualified electronic signature and a timestamp, creating a coherent whole to guarantee the integrity and date certainty of the document. Currently, Poland is implementing <\/span><b>National e-Invoicing System (KSeF)<\/b><span style=\"font-weight: 400;\"> - a platform for issuing and receiving structured electronic invoices. Each invoice sent to KSeF receives a <\/span><a href=\"https:\/\/podpisano.pl\/en\/czy-e-doreczenia-wplyna-na-ksef-kluczowe-informacje-dla-przedsiebiorcow\/\"><b>digital time stamp<\/b><\/a><span style=\"font-weight: 400;\"> assigned by this system. Such a marker certifies the moment an invoice is received into the system and protects it from later manipulation. In this way, both the issuer and recipient of the invoice have official confirmation of the document's time of issue, which is important for tax settlements and payment deadlines. Although the introduction of mandatory KSeF for all businesses has been postponed until 2026, more and more companies are already voluntarily using e-invoices with a time stamp, valuing the automatic confirmation of the invoice receipt date.<\/span><\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Long-term archiving of electronic documents.<\/b><span style=\"font-weight: 400;\">\u00a0If digital documents need to be stored for many years (e.g., notarial files, financial or HR records), there is the challenge of maintaining them <\/span><b>credibility in the long term<\/b><span style=\"font-weight: 400;\">. Over the years, the electronic certificates used to sign a document can expire or be invalidated, and cryptographic algorithms can lose their strength. Time stamps are a solution to <\/span><b>long-term validation<\/b><span style=\"font-weight: 400;\">: the use of the tag at the time of signing the document confirms that the signature was made within the validity period of the certificate, which will enable the signature to be correctly verified even many years later. In addition, periodic <\/span><b>time stamp renewal<\/b><span style=\"font-weight: 400;\"> (e.g., adding another timestamp every few years) makes it possible to prolong confidence in the document despite potential technological changes. The most stringent electronic signature profiles, the so-called archival forms, even provide for multiple time stamps on a document over the course of its storage. As a result, electronically archived documents retain the <\/span><b>full integrity and reliability<\/b><span style=\"font-weight: 400;\"> Even decades after their creation.<\/span><\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<p><b>Electronic communication and delivery.<\/b><span style=\"font-weight: 400;\">\u00a0Electronic correspondence exchanges also use time stamps. An example is the so-called. <\/span><b>qualified registered electronic delivery services<\/b><span style=\"font-weight: 400;\"> (Qualified Electronic Registered Delivery Service), regulated by eIDAS - their function is to provide proof of the sending and receiving of messages along with the time of these events. According to the regulations, evidence of such deliveries <\/span><b>must be accompanied by a qualified time stamp<\/b><span style=\"font-weight: 400;\">, to unambiguously confirm the moments of sending and receiving an electronic package. Also in everyday business communication, time stamps play a role: if you send important documents by email or ePUAP platform, it is worth signing and time-stamping them so that in the future you can show exactly when they were sent or submitted. A system of statutory electronic delivery is coming into force in Poland, in which official certificates of submission (UPP) and receipt (UPO) of documents will be automatically time-stamped, being the digital equivalent of a postmark with a date.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8e84d5 elementor-widget elementor-widget-text-editor\" data-id=\"b8e84d5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"2770\" data-end=\"3100\">Electronic timestamping is an indispensable part of digital workflow. It allows secure documentation of when information was created or sent and effectively protects against tampering. The use of a qualified timestamp is particularly important for documents of great legal and financial importance.<\/p><p data-start=\"3102\" data-end=\"3244\"><strong><span style=\"font-size: 1rem;\">We encourage you to take a look at <a href=\"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-2-2\/\">second part of the article<\/a>, which details the practical applications of the electronic time stamp in various sectors.<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef95c91 elementor-widget-divider--view-line_icon elementor-view-default elementor-widget-divider--element-align-center elementor-widget elementor-widget-divider\" data-id=\"ef95c91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon elementor-divider__element\">\n\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-hand-pointer\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M358.182 179.361c-19.493-24.768-52.679-31.945-79.872-19.098-15.127-15.687-36.182-22.487-56.595-19.629V67c0-36.944-29.736-67-66.286-67S89.143 30.056 89.143 67v161.129c-19.909-7.41-43.272-5.094-62.083 8.872-29.355 21.795-35.793 63.333-14.55 93.152l109.699 154.001C134.632 501.59 154.741 512 176 512h178.286c30.802 0 57.574-21.5 64.557-51.797l27.429-118.999A67.873 67.873 0 0 0 448 326v-84c0-46.844-46.625-79.273-89.818-62.639zM80.985 279.697l27.126 38.079c8.995 12.626 29.031 6.287 29.031-9.283V67c0-25.12 36.571-25.16 36.571 0v175c0 8.836 7.163 16 16 16h6.857c8.837 0 16-7.164 16-16v-35c0-25.12 36.571-25.16 36.571 0v35c0 8.836 7.163 16 16 16H272c8.837 0 16-7.164 16-16v-21c0-25.12 36.571-25.16 36.571 0v21c0 8.836 7.163 16 16 16h6.857c8.837 0 16-7.164 16-16 0-25.121 36.571-25.16 36.571 0v84c0 1.488-.169 2.977-.502 4.423l-27.43 119.001c-1.978 8.582-9.29 14.576-17.782 14.576H176c-5.769 0-11.263-2.878-14.697-7.697l-109.712-154c-14.406-20.223 14.994-42.818 29.394-22.606zM176.143 400v-96c0-8.837 6.268-16 14-16h6c7.732 0 14 7.163 14 16v96c0 8.837-6.268 16-14 16h-6c-7.733 0-14-7.163-14-16zm75.428 0v-96c0-8.837 6.268-16 14-16h6c7.732 0 14 7.163 14 16v96c0 8.837-6.268 16-14 16h-6c-7.732 0-14-7.163-14-16zM327 400v-96c0-8.837 6.268-16 14-16h6c7.732 0 14 7.163 14 16v96c0 8.837-6.268 16-14 16h-6c-7.732 0-14-7.163-14-16z\"><\/path><\/svg><\/div>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f10e6e elementor-post-navigation-borders-yes elementor-widget elementor-widget-post-navigation\" data-id=\"2f10e6e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-navigation.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-post-navigation\" role=\"navigation\" aria-label=\"Post Navigation\">\n\t\t\t<div class=\"elementor-post-navigation__prev elementor-post-navigation__link\">\n\t\t\t\t<a href=\"https:\/\/podpisano.pl\/en\/certyfikat-kwalifikowany-a-podpis-elektroniczny-wyjasniamy-roznice\/\" rel=\"prev\"><span class=\"post-navigation__arrow-wrapper post-navigation__arrow-prev\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-angle-left\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M31.7 239l136-136c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 24.6 0 33.9L127.9 256l96.4 96.4c9.4 9.4 9.4 24.6 0 33.9L201.7 409c-9.4 9.4-24.6 9.4-33.9 0l-136-136c-9.5-9.4-9.5-24.6-.1-34z\"><\/path><\/svg><span class=\"elementor-screen-only\">Prev<\/span><\/span><span class=\"elementor-post-navigation__link__prev\"><span class=\"post-navigation__prev--label\">Previous<\/span><\/span><\/a>\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-post-navigation__separator-wrapper\">\n\t\t\t\t\t<div class=\"elementor-post-navigation__separator\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"elementor-post-navigation__next elementor-post-navigation__link\">\n\t\t\t\t<a href=\"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-2-2\/\" rel=\"next\"><span class=\"elementor-post-navigation__link__next\"><span class=\"post-navigation__next--label\">Next<\/span><\/span><span class=\"post-navigation__arrow-wrapper post-navigation__arrow-next\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-angle-right\" viewbox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><span class=\"elementor-screen-only\">Next<\/span><\/span><\/a>\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\t\t<div class=\"elementor-element elementor-element-fbcfbc7 elementor-widget elementor-widget-heading\" data-id=\"fbcfbc7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Call us at\n<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-faf3887 elementor-widget elementor-widget-heading\" data-id=\"faf3887\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\"><a href=\"tel:+48%2022%20417%2005%2055\"> +48 22 417 05 55\n<\/a><\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e6bd9dc elementor-widget elementor-widget-heading\" data-id=\"e6bd9dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">and we will put you in touch with one of our representatives available virtually nationwide.<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Electronic timestamping is an indispensable part of digital workflow. It allows you to securely document when information was created or sent and effectively protects against tampering.<\/p>","protected":false},"author":322,"featured_media":6903,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[319],"tags":[328,331,330,296,290,301,329,304],"class_list":["post-6878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cyberbezpieczenstwo","tag-cyberbezpieczenstwo-2","tag-cyfryzacja","tag-it","tag-podpis-elektroniczny","tag-podpis-kwalifikowany","tag-tozsamosc","tag-systemy-it","tag-zaufanie-cyfrowe"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\/2 - Podpisano.pl<\/title>\n<meta name=\"description\" content=\"Poznaj, czym jest elektroniczny znacznik czasu w us\u0142ugach zaufania cyfrowego, jak dzia\u0142a i dlaczego jest kluczowy dla bezpiecze\u0144stwa dokument\u00f3w online. Podpisano.pl\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\/2\" \/>\n<meta property=\"og:description\" content=\"Poznaj, czym jest elektroniczny znacznik czasu w us\u0142ugach zaufania cyfrowego, jak dzia\u0142a i dlaczego jest kluczowy dla bezpiecze\u0144stwa dokument\u00f3w online. Podpisano.pl\" \/>\n<meta property=\"og:url\" content=\"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Podpisano.pl\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/podpisanopl\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/podpisanopl\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-28T17:46:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-28T22:59:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/podpisano.pl\/wp-content\/uploads\/2025\/05\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0-1024x771.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"771\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Anna Lyda\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@podpisano\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Anna Lyda\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/\"},\"author\":{\"name\":\"Anna Lyda\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#\\\/schema\\\/person\\\/30d1f76df7792ba7bbf928b8e1732149\"},\"headline\":\"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\\\/2\",\"datePublished\":\"2025-05-28T17:46:58+00:00\",\"dateModified\":\"2025-05-28T22:59:44+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/\"},\"wordCount\":1267,\"publisher\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/podpisano.pl\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png\",\"keywords\":[\"cyberbezpiecze\u0144stwo\",\"Cyfryzacja\",\"IT\",\"podpis elektroniczny\",\"podpis kwalifikowany\",\"Potwierdzenie to\u017csamo\u015bci\",\"systemy IT\",\"zaufanie cyfrowe\"],\"articleSection\":[\"Cyberbezpiecze\u0144stwo\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/\",\"url\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/\",\"name\":\"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\\\/2 - Podpisano.pl\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/podpisano.pl\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png\",\"datePublished\":\"2025-05-28T17:46:58+00:00\",\"dateModified\":\"2025-05-28T22:59:44+00:00\",\"description\":\"Poznaj, czym jest elektroniczny znacznik czasu w us\u0142ugach zaufania cyfrowego, jak dzia\u0142a i dlaczego jest kluczowy dla bezpiecze\u0144stwa dokument\u00f3w online. Podpisano.pl\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#primaryimage\",\"url\":\"https:\\\/\\\/podpisano.pl\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png\",\"contentUrl\":\"https:\\\/\\\/podpisano.pl\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png\",\"width\":1232,\"height\":928,\"caption\":\"Znaczniki czasu w us\u0142ugach zaufania cyfrowego\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/podpisano.pl\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\\\/2\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#website\",\"url\":\"https:\\\/\\\/podpisano.pl\\\/\",\"name\":\"Podpisano.pl\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/podpisano.pl\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#organization\",\"name\":\"Podpisano.pl\",\"alternateName\":\"podpisano\",\"url\":\"https:\\\/\\\/podpisano.pl\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/podpisano.pl\\\/wp-content\\\/uploads\\\/2024\\\/06\\\/podpisano.pl-autoryzowany-partenr-Certum.png\",\"contentUrl\":\"https:\\\/\\\/podpisano.pl\\\/wp-content\\\/uploads\\\/2024\\\/06\\\/podpisano.pl-autoryzowany-partenr-Certum.png\",\"width\":500,\"height\":394,\"caption\":\"Podpisano.pl\"},\"image\":{\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/podpisanopl\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/81751679\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/podpisano.pl\\\/#\\\/schema\\\/person\\\/30d1f76df7792ba7bbf928b8e1732149\",\"name\":\"Anna Lyda\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/36fb2b6e6b371043d4da48d8f0fb7ea57ee41dff91aa37aeea8491721b17cece?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/36fb2b6e6b371043d4da48d8f0fb7ea57ee41dff91aa37aeea8491721b17cece?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/36fb2b6e6b371043d4da48d8f0fb7ea57ee41dff91aa37aeea8491721b17cece?s=96&d=mm&r=g\",\"caption\":\"Anna Lyda\"},\"description\":\"Specjalizujemy si\u0119 w cyfrowych us\u0142ugach zaufania, takich jak podpisy elektroniczne, piecz\u0119cie, dor\u0119czenia i identyfikacja online. Pomagamy firmom i instytucjom w bezpiecznym i efektywnym zarz\u0105dzaniu dokumentami oraz to\u017csamo\u015bci\u0105 w erze cyfrowej.\",\"sameAs\":[\"http:\\\/\\\/www.podpisano.pl\",\"https:\\\/\\\/www.facebook.com\\\/podpisanopl\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/podpisano-elektroniczny-podpis-kwalifikowany\\\/posts\\\/?feedView=all&viewAsMember=true\",\"https:\\\/\\\/x.com\\\/podpisano\"],\"url\":\"https:\\\/\\\/podpisano.pl\\\/en\\\/author\\\/annalyda\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Electronic timestamp - what is it, how does it work and why should you use it? 1\/2 - Podpisano.pl","description":"Learn what electronic timestamping is in digital trust services, how it works, and why it's crucial for online document security. Podpisano.pl","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/","og_locale":"en_US","og_type":"article","og_title":"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\/2","og_description":"Poznaj, czym jest elektroniczny znacznik czasu w us\u0142ugach zaufania cyfrowego, jak dzia\u0142a i dlaczego jest kluczowy dla bezpiecze\u0144stwa dokument\u00f3w online. Podpisano.pl","og_url":"https:\/\/podpisano.pl\/en\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/","og_site_name":"Podpisano.pl","article_publisher":"https:\/\/www.facebook.com\/podpisanopl","article_author":"https:\/\/www.facebook.com\/podpisanopl\/","article_published_time":"2025-05-28T17:46:58+00:00","article_modified_time":"2025-05-28T22:59:44+00:00","og_image":[{"width":1024,"height":771,"url":"https:\/\/podpisano.pl\/wp-content\/uploads\/2025\/05\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0-1024x771.png","type":"image\/png"}],"author":"Anna Lyda","twitter_card":"summary_large_image","twitter_creator":"@podpisano","twitter_misc":{"Written by":"Anna Lyda","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#article","isPartOf":{"@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/"},"author":{"name":"Anna Lyda","@id":"https:\/\/podpisano.pl\/#\/schema\/person\/30d1f76df7792ba7bbf928b8e1732149"},"headline":"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\/2","datePublished":"2025-05-28T17:46:58+00:00","dateModified":"2025-05-28T22:59:44+00:00","mainEntityOfPage":{"@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/"},"wordCount":1267,"publisher":{"@id":"https:\/\/podpisano.pl\/#organization"},"image":{"@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#primaryimage"},"thumbnailUrl":"https:\/\/podpisano.pl\/wp-content\/uploads\/2025\/05\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png","keywords":["cyberbezpiecze\u0144stwo","Cyfryzacja","IT","podpis elektroniczny","podpis kwalifikowany","Potwierdzenie to\u017csamo\u015bci","systemy IT","zaufanie cyfrowe"],"articleSection":["Cyberbezpiecze\u0144stwo"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/","url":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/","name":"Electronic timestamp - what is it, how does it work and why should you use it? 1\/2 - Podpisano.pl","isPartOf":{"@id":"https:\/\/podpisano.pl\/#website"},"primaryImageOfPage":{"@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#primaryimage"},"image":{"@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#primaryimage"},"thumbnailUrl":"https:\/\/podpisano.pl\/wp-content\/uploads\/2025\/05\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png","datePublished":"2025-05-28T17:46:58+00:00","dateModified":"2025-05-28T22:59:44+00:00","description":"Learn what electronic timestamping is in digital trust services, how it works, and why it's crucial for online document security. Podpisano.pl","breadcrumb":{"@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#primaryimage","url":"https:\/\/podpisano.pl\/wp-content\/uploads\/2025\/05\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png","contentUrl":"https:\/\/podpisano.pl\/wp-content\/uploads\/2025\/05\/aly07089_A_photo_of_a_smiling_close-up_portrait_of_an_attract_41568889-3c53-4abe-b4ed-89ddd7993e26_0.png","width":1232,"height":928,"caption":"Znaczniki czasu w us\u0142ugach zaufania cyfrowego"},{"@type":"BreadcrumbList","@id":"https:\/\/podpisano.pl\/elektroniczny-znacznik-czasu-czym-jest-jak-dziala-i-dlaczego-warto-go-uzywac-1-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/podpisano.pl\/"},{"@type":"ListItem","position":2,"name":"Elektroniczny znacznik czasu \u2013 czym jest, jak dzia\u0142a i dlacze\u00adgo warto go u\u017cywa\u0107? 1\/2"}]},{"@type":"WebSite","@id":"https:\/\/podpisano.pl\/#website","url":"https:\/\/podpisano.pl\/","name":"Podpisano.pl","description":"","publisher":{"@id":"https:\/\/podpisano.pl\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/podpisano.pl\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/podpisano.pl\/#organization","name":"Podpisano.pl","alternateName":"podpisano","url":"https:\/\/podpisano.pl\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/podpisano.pl\/#\/schema\/logo\/image\/","url":"https:\/\/podpisano.pl\/wp-content\/uploads\/2024\/06\/podpisano.pl-autoryzowany-partenr-Certum.png","contentUrl":"https:\/\/podpisano.pl\/wp-content\/uploads\/2024\/06\/podpisano.pl-autoryzowany-partenr-Certum.png","width":500,"height":394,"caption":"Podpisano.pl"},"image":{"@id":"https:\/\/podpisano.pl\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/podpisanopl","https:\/\/www.linkedin.com\/company\/81751679\/"]},{"@type":"Person","@id":"https:\/\/podpisano.pl\/#\/schema\/person\/30d1f76df7792ba7bbf928b8e1732149","name":"Anna Lyda","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/36fb2b6e6b371043d4da48d8f0fb7ea57ee41dff91aa37aeea8491721b17cece?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/36fb2b6e6b371043d4da48d8f0fb7ea57ee41dff91aa37aeea8491721b17cece?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/36fb2b6e6b371043d4da48d8f0fb7ea57ee41dff91aa37aeea8491721b17cece?s=96&d=mm&r=g","caption":"Anna Lyda"},"description":"We specialize in digital trust services such as digital signatures, seals, delivery and online identification. We help companies and institutions manage documents and identities securely and efficiently in the digital age.","sameAs":["http:\/\/www.podpisano.pl","https:\/\/www.facebook.com\/podpisanopl\/","https:\/\/www.linkedin.com\/company\/podpisano-elektroniczny-podpis-kwalifikowany\/posts\/?feedView=all&viewAsMember=true","https:\/\/x.com\/podpisano"],"url":"https:\/\/podpisano.pl\/en\/author\/annalyda\/"}]}},"_links":{"self":[{"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/posts\/6878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/users\/322"}],"replies":[{"embeddable":true,"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/comments?post=6878"}],"version-history":[{"count":0,"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/posts\/6878\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/media\/6903"}],"wp:attachment":[{"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/media?parent=6878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/categories?post=6878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/podpisano.pl\/en\/wp-json\/wp\/v2\/tags?post=6878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}