{"id":10311,"date":"2026-07-15T09:00:06","date_gmt":"2026-07-15T07:00:06","guid":{"rendered":"https:\/\/www.intesa.it\/the-race-to-q-day-how-to-protect-digital-trust-in-the-age-of-quantum-computing\/"},"modified":"2026-10-09T15:47:14","modified_gmt":"2026-10-09T13:47:14","slug":"the-race-to-q-day-how-to-protect-digital-trust-in-the-age-of-quantum-computing","status":"publish","type":"post","link":"https:\/\/www.intesa.it\/en\/the-race-to-q-day-how-to-protect-digital-trust-in-the-age-of-quantum-computing\/","title":{"rendered":"The race to Q-Day: how to protect digital trust in the age of quantum computing"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Cybersecurity and cryptographic migration: Qualified Trust Service Providers (QTSP) strengthen their defenses against future quantum threats by increasing their robustness.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By Simone Baldini, Head of Business Compliance<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.intesa.it\/wp-content\/uploads\/2026\/07\/Articolo_QuantumComputing.png\" alt=\"The race to Q-Day: how to protect digital trust in the age of quantum computing\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>As the adoption of advanced technologies accelerates business processes, the evolution of industrial-scale quantum computers calls for an immediate rethink of our security standards.<\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity has-alpha-channel-opacity\"\/>\n\n\n\n<div>\n<figure><img loading=\"lazy\" decoding=\"async\" class=\"freccia-interna alignright wp-image-XXXXX\" src=\"https:\/\/www.intesa.it\/wp-content\/uploads\/2025\/10\/freccia-interna.png\" alt=\"\" width=\"31\" height=\"36\"><\/figure><p><\/p>\n<p style=\"padding-left: 26px; padding-top: 26px;\"><strong>In this article you&#8217;ll discover:<\/strong><\/p>\n<\/div>\n\n\n\n\t<div id=\"toc\">\t  \n\t<\/div>\n\n\t<script>\n\t\tvar c = function() {\n\t\t\treturn({\n\t\t\t\tlog: function(msg) {\n\t\t\t\t\tconsoleDiv = document.querySelector(\"main#single_news .contenuto_news\");\n\t\t\t\t\tpara = document.createElement('p');\n\t\t\t\t\ttext = document.createTextNode(msg);\n\t\t\t\t\tpara.appendChild(text);\n\t\t\t\t\tconsoleDiv.appendChild(para);\n\t\t\t\t}\n\t\t\t});\n\t\t}();\n\n\t\t\/*window.onload = function () {\n\t\t\tvar toc = \"\";\n\t\t\tvar level = 0;\n\t\t\tvar maxLevel = 3;\n\t\t\t\n\t\t\tconst reg = \/<h([\\d])>([^<]+)<\\\/h([\\d])>\/gi;\n\t\t\t\/\/const reg = \/<h([1-6])\\b[^>]*>([\\s\\S]*?)<\\\/h\\1>\/gi;\n\t\t\t\n\t\t\tdocument.querySelector(\"main#single_news .contenuto_news\").innerHTML =\n\t\t\t\tdocument.querySelector(\"main#single_news .contenuto_news\").innerHTML.replace( \/\/\n\t\t\t\t\treg,\n\t\t\t\t\tfunction (str, openLevel, titleText, closeLevel) {\n\t\t\t\t\t\tif (openLevel != closeLevel) {\n\t\t\t\t\t\t\tc.log(openLevel)\n\t\t\t\t\t\t\t\treturn str + ' - ' + openLevel;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif (openLevel > level) {\n\t\t\t\t\t\t\ttoc += (new Array(openLevel - level + 1)).join(\"<ul>\");\n\t\t\t\t\t\t} else if (openLevel < level) {\n\t\t\t\t\t\t\ttoc += (new Array(level - openLevel + 1)).join(\"<\/ul>\");\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tlevel = parseInt(openLevel);\n\n\t\t\t\t\t\tvar anchor = titleText.replace(\/ \/g, \"_\");\n\t\t\t\t\t\ttoc += \"<li><a href=\\\"#\" + anchor + \"\\\">\" + titleText + \"<\/a><\/li>\";\n\n\t\t\t\t\t\treturn \"<h\" + openLevel + \"><a name=\\\"\" + anchor + \"\\\">\" + titleText + \"<\/a><\/h\" + closeLevel + \">\";\n\t\t\t\t\t}\n\t\t\t\t);\n\n\t\t\tif (level) {\n\t\t\t\ttoc += (new Array(level + 1)).join(\"<\/ol>\");\n\t\t\t}\n\n\t\t\tdocument.querySelector(\"main#single_news .contenuto_news #toc\").innerHTML += toc;\n\t\t};*\/\n\t\twindow.onload = function () {\n\t\t\tvar toc = \"\";\n\t\t\tvar currentLevel = 0;\n\t\t\tvar anchorsSeen = {};\n\n\t\t\tconst reg = \/(<h([1-6])\\b[^>]*>)([\\s\\S]*?)<\\\/h\\2>\/gi;\n\t\t\tconst container = document.querySelector(\"main#single_news .contenuto_news\");\n\n\t\t\tif (!container) return;\n\n\t\t\t\/\/ Rileva l\u2019eventuale h2.wp-block-heading primo figlio da escludere\n\t\t\tconst excludeHeading = container.querySelector(\":scope > h2.wp-block-heading:first-child\");\n\n\t\t\tcontainer.innerHTML = container.innerHTML.replace(\n\t\t\t\treg,\n\t\t\t\tfunction (fullMatch, openTag, levelStr, innerHTML, offset, fullString) {\n\t\t\t\t\t\/\/ Ignora se corrisponde all'h2.wp-block-heading:first-child\n\t\t\t\t\tif (excludeHeading && fullMatch.includes(excludeHeading.outerHTML)) {\n\t\t\t\t\t\treturn fullMatch;\n\t\t\t\t\t}\n\n\t\t\t\t\t\/\/ Esclude i titoli subito dopo <hr class=\"wp-block-separator\">\n\t\t\t\t\tconst prevChunk = fullString.slice(Math.max(0, offset - 100), offset);\n\t\t\t\t\tif (\/<hr[^>]*class=[\"']wp-block-separator[\"'][^>]*>\\s*$\/i.test(prevChunk)) {\n\t\t\t\t\t\treturn fullMatch;\n\t\t\t\t\t}\n\n\t\t\t\t\tvar level = parseInt(levelStr, 10);\n\t\t\t\t\tvar titleText = innerHTML.replace(\/<\\\/?[^>]+(>|$)\/g, \"\").trim();\n\t\t\t\t\tif (!titleText) return fullMatch;\n\n\t\t\t\t\tvar anchorBase = titleText.replace(\/\\s+\/g, \"_\").replace(\/[^\\w\\-_.]\/g, \"\");\n\t\t\t\t\tvar anchor = anchorBase || (\"heading_\" + Math.random().toString(36).slice(2, 8));\n\n\t\t\t\t\tif (anchorsSeen[anchor]) {\n\t\t\t\t\t\tanchorsSeen[anchor] += 1;\n\t\t\t\t\t\tanchor = anchor + \"_\" + anchorsSeen[anchor];\n\t\t\t\t\t} else {\n\t\t\t\t\t\tanchorsSeen[anchor] = 1;\n\t\t\t\t\t}\n\n\t\t\t\t\tif (level > currentLevel) toc += \"<ul>\".repeat(level - currentLevel);\n\t\t\t\t\telse if (level < currentLevel) toc += \"<\/ul>\".repeat(currentLevel - level);\n\t\t\t\t\tcurrentLevel = level;\n\n\t\t\t\t\ttoc += `<li><a href=\"#${anchor}\">${titleText}<\/a><\/li>`;\n\n\t\t\t\t\treturn `${openTag}<a name=\"${anchor}\"><\/a>${innerHTML}<\/h${level}>`;\n\t\t\t\t}\n\t\t\t);\n\n\t\t\tif (currentLevel) toc += \"<\/ul>\".repeat(currentLevel);\n\n\t\t\tvar tocContainer = container.querySelector(\"#toc\");\n\t\t\tif (tocContainer) tocContainer.innerHTML += toc;\n\t\t};\n\n\t<\/script>\n\t\n\t\n\n\n\n<p class=\"wp-block-paragraph\">The cybersecurity landscape is facing an unprecedented transformation. While the attention of the media and of businesses is currently focused mainly on the opportunities and risks of artificial intelligence, an even deeper challenge is looming on the horizon. The development of industrial-scale quantum computers is a genuine technological revolution, but it brings with it a systemic threat: the ability to easily break the public-key cryptographic protocols that today form the backbone of the internet and of global trust services. Protecting the integrity and legal validity of digital documents and identities is therefore a priority that can no longer be postponed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The threat of quantum computing and the &#8220;Harvest Now, Decrypt Later&#8221; scenario<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The quantum computer capable of breaking today&#8217;s encryption systems is not yet a widespread reality, but the threat it poses calls for immediate, proactive adaptation. Sufficiently powerful quantum computers could, in fact, solve in a very short time some of the mathematical problems that make public-key cryptography secure today, and would thus be able to break cryptographic keys that are currently considered safe.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The term <strong>Q-Day<\/strong> identifies the exact moment when a sufficiently powerful and stable quantum computer will be able to break the mathematical shields of classical cryptography. Although a machine with such computational capabilities is not yet available on the market, according to the Quantum Threat Timeline Report of the Global Risk Institute \u2014 the most authoritative and long-running expert survey on this topic \u2014 the estimated probability that such a quantum computer will become a reality by 2035 now stands between 28% and 49%, a marked increase compared to previous editions of the report.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most concrete and current risk is linked to a strategy adopted by cybercriminals and other malicious actors, known as <strong>&#8220;Harvest Now, Decrypt Later&#8221;<\/strong>. Large quantities of encrypted data are intercepted and stored today, with the aim of decrypting them as soon as sufficiently powerful quantum machines become available. This scenario puts the integrity and legal validity of digital documents and identities at risk in the long term, because data that seems safe today could prove vulnerable in a few years.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The ENISA guidelines and the two-phase migration strategy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To counter this scenario, the <strong>European Union Agency for Cybersecurity (ENISA)<\/strong> has issued specific guidelines that must be adopted by qualified trust service providers (QTSPs). The recommendations of the European authority suggest adopting measures to strengthen the security of services and, with their reference within the eIDAS Implementing Acts, they apply in full from 19 August of next year: a specific obligation for qualified trust service providers, distinct from the broader European roadmap for the transition to <strong>Post-Quantum Cryptography (PQC)<\/strong>, which has its own deadlines between 2026 and 2030.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The technological migration strategy set out by ENISA is divided into two sequential macro-phases. First, current technologies and algorithms are kept in place, but with a significant increase in the size of the cryptographic keys to strengthen their protection. The next phase involves a complete technological replacement that will integrate PQC mechanisms, introducing algorithms designed specifically to withstand quantum attacks while running on traditional infrastructure. It is essential to distinguish the scope of the two phases. The first, immediate phase increases the length of classical cryptographic keys (for example, towards 3072-bit RSA where this widely used algorithm is employed): a strengthening of robustness, aligned with the strictest ENISA requirements currently available, but one that does not in itself make certificates &#8220;quantum resistant&#8221;. A sufficiently powerful quantum computer would still be able to break an RSA key, even a 3072-bit one, albeit with greater difficulty. True resistance to quantum attacks will be guaranteed only by the second phase, with the adoption of Post-Quantum Cryptography (PQC) algorithms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Intesa can support your business in the quantum transition<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Protecting a company&#8217;s information assets and ensuring the long-term validity of digitally signed documents requires expertise, ready infrastructure and a clear vision of <em>crypto-agility<\/em>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a leading QTSP in the sector, <strong>Intesa<\/strong> has already defined its technology roadmap in full compliance with European guidance. The move to stronger keys will not be imposed from above, but will be a controlled process carried out <strong>by agreement with, and with the consent of, the customer<\/strong>. This methodological approach is essential to ensure full <strong>system interoperability<\/strong>: an abrupt, unagreed change could in fact make files signed with the new specifications temporarily unreadable by third parties or by public administrations that are not yet aligned with the new standards. This is the first step of a broader path: Intesa is actively following the evolution of Post-Quantum Cryptography standards in order to plan, in the next phase, the migration to truly quantum-safe algorithms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Through its solutions for digital signature and document management, Intesa supports companies at every stage of this delicate regulatory and technological transition. Choosing Intesa&#8217;s trust services means relying on a partner that accompanies you step by step through the cryptographic upgrade, from the immediate strengthening of keys to the future adoption of post-quantum standards, ensuring business continuity at every stage.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">Discover our solutions for your company&#8217;s digital transformation:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/electronic-archiving\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Electronic Archiving of Documents\">Electronic Archiving of Documents<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/identification\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Customer Digital Onboarding\">Customer Digital Onboarding<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/edi-electronic-data-interchange\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"EDI - Electronic Data Interchange\">EDI \u2013 Electronic Data Interchange<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/electronic-invoicing\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Electronic Invoicing Platform\">Electronic Invoicing Platform<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/international-electronic-invoicing\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"International Electronic Invoicing\">International Electronic Invoicing<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/electronic-signature\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Business Electronic Signature\">Business Electronic Signature<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/document-management-software\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Document Management Software\">Document Management Software<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.intesa.it\/en\/what-we-do\/supply-chain-management\/\" target=\"_blank\" rel=\"noopener noreferrer\" title=\"Supply Chain Management\">Supply Chain Management<\/a><\/li>\n<\/ul>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Mentre l\u2019adozione di tecnologie avanzate accelera i processi di business, l&#8217;evoluzione dei computer quantistici su scala industriale richiede un ripensamento immediato dei nostri standard di sicurezza. <\/p>\n","protected":false},"author":6,"featured_media":10317,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[180],"tags":[259,283,300],"class_list":["post-10311","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solutions","tag-cybersecurity-2","tag-digital-identity-2","tag-onboarding-2"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"How can trust services be adapted to the quantum computing threat? Discover Intesa\u2019s proactive and secure cryptographic migration strategy.\" \/>\n\t<meta name=\"robots\" content=\"max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n\t<meta name=\"author\" content=\"Mariacristina\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.intesa.it\/en\/the-race-to-q-day-how-to-protect-digital-trust-in-the-age-of-quantum-computing\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Intesa | Soluzioni per la trasformazione digitale delle aziende.\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Post-quantum security and trust services: Intesa\u2019s strategy\" \/>\n\t\t<meta property=\"og:description\" content=\"How can trust services be adapted to the quantum computing threat? 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