{"id":32222,"date":"2021-05-19T12:13:48","date_gmt":"2021-05-19T10:13:48","guid":{"rendered":"https:\/\/www.viafirma.com\/faq\/managing-trusted-certificates-in-adobe-reader\/"},"modified":"2024-11-20T09:11:32","modified_gmt":"2024-11-20T08:11:32","slug":"management-trusted-certificates","status":"publish","type":"faq","link":"https:\/\/www.viafirma.com\/en\/faqs\/management-trusted-certificates\/","title":{"rendered":"Managing trusted certificates in Adobe Reader"},"content":{"rendered":"<p>Knowing how to install trusted certificates in Adobe Reader is essential to avoid errors that prevent us from signing a document using this tool.<\/p>\n<p>A very common situation when signing PDF with a digital certificate in Adobe Reader is that it indicates &#8220;The validity of the document certification is UNKNOWN. The author cannot be verified&#8221;, visible in the Signature Panel and in the signature stamps (if any). This happens because Adobe Reader does not recognize as a trusted issuer the Qualified Service Provider (QSP, formerly known as Certification Authority, CA) that issued the certificate (for example FNMT, Camerfirma, Firmaprofesional, AVANSI&#8230;).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-30277 aligncenter\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Error-validez-de-certificacion-1024x551.jpg.webp\" alt=\"\" width=\"700\" height=\"377\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Error-validez-de-certificacion-1024x551.jpg.webp 1024w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Error-validez-de-certificacion-1024x551.jpg-300x161.webp 300w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Error-validez-de-certificacion-1024x551.jpg-768x413.webp 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<p>To solve it, we will configure Adobe Reader to trust the certificate issuer or, in other words, we will add it to the trusted certificates. Right-click on the signature that is giving problems and select &#8220;Show signature properties&#8221;.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30279\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-propiedades-de-firma-1024x623.jpg.webp\" alt=\"\" width=\"700\" height=\"426\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-propiedades-de-firma-1024x623.jpg.webp 1024w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-propiedades-de-firma-1024x623.jpg-300x183.webp 300w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-propiedades-de-firma-1024x623.jpg-768x467.webp 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<p>A window opens with the &#8220;Properties of the electronic signature&#8221; of the PDF. We can see the details of the signature information. Click on the &#8220;Show signer&#8217;s certificate&#8221; button.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30281 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-certificado-de-firmante.jpg.webp\" alt=\"\" width=\"567\" height=\"593\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-certificado-de-firmante.jpg.webp 567w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Mostrar-certificado-de-firmante.jpg-287x300.webp 287w\" sizes=\"auto, (max-width: 567px) 100vw, 567px\" \/><\/p>\n<p>Next, the Certificate Viewer opens. We see the certificate issuer (in this case Firmaprofesional) and the certificate details.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30283 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Autoridad-emisora-del-certificado.jpg.webp\" alt=\"\" width=\"708\" height=\"755\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Autoridad-emisora-del-certificado.jpg.webp 708w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Autoridad-emisora-del-certificado.jpg-281x300.webp 281w\" sizes=\"auto, (max-width: 708px) 100vw, 708px\" \/><\/p>\n<p>Next, we open the &#8220;Trust&#8221; tab, where we see that &#8220;This certificate is not trusted&#8221; (this is the source of the problem). Click on &#8220;Add to trusted certificates&#8221;.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30285 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Este-certificado-no-es-de-confianza_agregar-certificados-de-confianza.jpg.webp\" alt=\"\" width=\"708\" height=\"755\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Este-certificado-no-es-de-confianza_agregar-certificados-de-confianza.jpg.webp 708w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Este-certificado-no-es-de-confianza_agregar-certificados-de-confianza.jpg-281x300.webp 281w\" sizes=\"auto, (max-width: 708px) 100vw, 708px\" \/><\/p>\n<p>It is possible that Adobe Acrobat shows us a warning message after clicking the previous button. We proceed to click on &#8220;Accept&#8221;.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30287 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Alerta_aceptar.jpg.webp\" alt=\"\" width=\"517\" height=\"211\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Alerta_aceptar.jpg.webp 517w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Alerta_aceptar.jpg-300x122.webp 300w\" sizes=\"auto, (max-width: 517px) 100vw, 517px\" \/><\/p>\n<p>The contact configuration import window opens. By default, an option is selected, within \u201c<strong>Trust<\/strong>\u201d, that says \u201c<strong>Use this certificate as root of trust<\/strong>\u201d (in other versions the message was different). We leave this option selected (or select it if it is not) and click on \u201c<strong>Accept<\/strong>\u201d successively in the windows that appear.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30289 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Utilizar-certificado-como-raiz-de-confianza.jpg.webp\" alt=\"\" width=\"590\" height=\"704\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Utilizar-certificado-como-raiz-de-confianza.jpg.webp 590w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Utilizar-certificado-como-raiz-de-confianza.jpg-251x300.webp 251w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/p>\n<p>We go back to the Signature Properties window. At the bottom there is a button that says &#8220;Validate signature&#8221;. Click on it.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30291 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Validar-firma.jpg.webp\" alt=\"\" width=\"567\" height=\"593\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Validar-firma.jpg.webp 567w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Validar-firma.jpg-287x300.webp 287w\" sizes=\"auto, (max-width: 567px) 100vw, 567px\" \/><\/p>\n<p>Perfect! Adobe Reader already says that the signature is valid because it already recognizes all the certificates of the trusted issuer. This operation must be done with all the Qualified Service Providers issuing certificates that we are going to use.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-30293 size-full\" src=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Certificacion-de-documento-valida-1.jpg.webp\" alt=\"\" width=\"567\" height=\"593\" srcset=\"https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Certificacion-de-documento-valida-1.jpg.webp 567w, https:\/\/www.viafirma.com\/wp-content\/uploads\/2023\/11\/Certificacion-de-documento-valida-1.jpg-287x300.webp 287w\" sizes=\"auto, (max-width: 567px) 100vw, 567px\" \/><\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[132],"class_list":["post-32222","faq","type-faq","status-publish","hentry","category-general"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/faq\/32222","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/faq"}],"about":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/types\/faq"}],"version-history":[{"count":0,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/faq\/32222\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/media?parent=32222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.viafirma.com\/en\/wp-json\/wp\/v2\/categories?post=32222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}