{"id":38492,"date":"2025-10-25T09:00:06","date_gmt":"2025-10-25T09:00:06","guid":{"rendered":"https:\/\/direc.dk\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/"},"modified":"2026-05-04T12:15:38","modified_gmt":"2026-05-04T12:15:38","slug":"threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi","status":"publish","type":"post","link":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/","title":{"rendered":"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

DIREC-projekt<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Projektv\u00e6rdi<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\tKlassisk kryptografi handler basalt set om sikker h\u00e5ndtering af hemmelige n\u00f8gler. Sikkerheden st\u00e5r og falder med, at en st\u00e6rk, hemmelig n\u00f8gle forbliver gemt for fjenden, men tilg\u00e6ngelig for brugeren. Men hvad hvis kvantecomputeren med sin gigantiske regnekraft kompromitterer den klassiske kryptografi? 

I kvante\u00e6raen vil computere kunne l\u00f8se matematiske problemer meget hurtigere end i dag. Derfor er post-kvante-kryptografi (PQ) bydende n\u00f8dvendigt. Udfordringen er at f\u00e5 de nye PQ-metoder til at fungere lige s\u00e5 smidigt som den nuv\u00e6rende kryptografi. 

Det er her projektet tager sin begyndelse. Threshold-baseret n\u00f8gleh\u00e5ndtering, hvor n\u00f8gler deles af flere brugere, skal g\u00f8res klar til den kommende kvantevirkelighed.  

I dette samarbejde vil AU og den danskledede virksomhed Blockdaemon sikre, at myndigheder, banker og kritisk infrastruktur kan operere i sikkerhed, n\u00e5r kvante\u00e6raen banker p\u00e5 d\u00f8ren. \t\t\t\t\t\t\t\t<\/div>\n\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
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

PROJEKTDATA<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\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
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
Projektnavn<\/strong><\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Threshold Key Management in the Post-Quantum Era<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
Projektperiode<\/strong><\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t2025-2027\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
Finansiering<\/strong><\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\tDKK 2.000.000\t\t\t\t\t\t\t\t<\/div>\n\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
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Videnskabelig tilgang<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\tProjektet er opdelt i tre spor. F\u00f8rst etableres et sammenligningsgrundlag via feasibility-analyse og performance-benchmarks, som tr\u00e6kker p\u00e5 AU\u2019s lange tradition for klassisk kryptologi. 

Dern\u00e6st etableres reglerne for, hvordan en digital underskrift kan laves af flere i f\u00e6llesskab. Metoden bygger p\u00e5 gitre, som er sv\u00e6rt at hacke – ogs\u00e5 med fremtidige kvantecomputere.  

Med MPC-in-the-Head-metoden konstrueres en delbar underskrift offline, som kan testes og forbedres. Det smart bevis skal i sidste ende g\u00f8res lille og effektivt, s\u00e5 det kan verificeres med standardv\u00e6rkt\u00f8jer i virkelighedens kommercielle systemer. 

Protokoller og sikkerhedsanalyser bliver omsat til prototyper, som Blockdaemon integrerer. M\u00e5let er, at enterprise-kunder vil kunne migrere til threshold-n\u00f8gler, som er sikre langt ude i fremtiden.\t\t\t\t\t\t\t\t<\/div>\n\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
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Projektdeltagere<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\n \n \n \n \n \n \n \n \n
\n
\"Claudio<\/div>\n <\/td>\n
\n
Claudio Orlandi – Professor – Aarhus University<\/div>\n <\/td>\n <\/tr>\n \n
\n
\"Sebastian<\/div>\n <\/td>\n
\n
Sebastian Kolby – Post Doc – Aarhus University<\/div>\n <\/td>\n <\/tr>\n \n
\n
\"Jakob<\/div>\n <\/td>\n
\n
Jakob Pagter – VP of Engineering, Wallet Security – Blockdaemon<\/div>\n <\/td>\n <\/tr>\n \n
\n
\"Michael<\/div>\n <\/td>\n
\n
Michael B\u00e6ksvang \u00d8stergaard – Staff Engineer, Security – Blockdaemon<\/div>\n <\/td>\n <\/tr>\n \n
\n
\"Thomas<\/div>\n <\/td>\n
\n
Thomas P. Jakobsen – Senior Cryptography Engineer – Blockdaemon<\/div>\n <\/td>\n <\/tr>\n \n <\/tbody>\n <\/table>\n \t\t\t\t\t\t\t\t<\/div>\n\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
\n\t\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Partnere<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\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
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\n
\n
\n \"Aarhus\"Blockdaemon\n <\/div>\n <\/div>\n \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":"

I kvante\u00e6raen vil computere l\u00f8se matematiske problemer langt mere effektivt, hvilket g\u00f8r post-kvantekryptografi (PQC) n\u00f8dvendig. Udfordringen er at g\u00f8re PQC lige s\u00e5 praktisk og gnidningsfri som nutidens systemer. Dette projekt tager udfordringen op ved at tilpasse t\u00e6rskelbaseret n\u00f8gleh\u00e5ndtering \u2013 hvor n\u00f8gler deles mellem flere parter \u2013 s\u00e5 den forbliver sikker i en kvantesikker fremtid.<\/p>\n","protected":false},"author":3,"featured_media":38485,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[210,218],"tags":[194],"class_list":["post-38492","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersikkerhed","category-projekt","tag-next-gen-cybersecurity-da"],"yoast_head":"\nThreshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0 - DIREC<\/title>\n<meta name=\"description\" content=\"Databases track information, move it back and forth, and ensure seamless integration across systems\u2014but all of this consumes energy. A lot of energy. What if it could be done more efficiently?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0 - DIREC\" \/>\n<meta property=\"og:description\" content=\"Databases track information, move it back and forth, and ensure seamless integration across systems\u2014but all of this consumes energy. A lot of energy. What if it could be done more efficiently?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/\" \/>\n<meta property=\"og:site_name\" content=\"DIREC\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-25T09:00:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-04T12:15:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Quantum-Secure-Cryptography.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Susanne Br\u00f8ndberg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skrevet af\" \/>\n\t<meta name=\"twitter:data1\" content=\"Susanne Br\u00f8ndberg\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimeret l\u00e6setid\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutter\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/\"},\"author\":{\"name\":\"Susanne Br\u00f8ndberg\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#\\\/schema\\\/person\\\/3fcdff2b9bc83fcb7b642fa67a946f38\"},\"headline\":\"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0\",\"datePublished\":\"2025-10-25T09:00:06+00:00\",\"dateModified\":\"2026-05-04T12:15:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/\"},\"wordCount\":156,\"publisher\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/direc.dk\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/Quantum-Secure-Cryptography.jpg\",\"keywords\":[\"Next gen cybersecurity\"],\"articleSection\":[\"Cybersikkerhed\",\"Projekt\"],\"inLanguage\":\"da-DK\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/\",\"url\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/\",\"name\":\"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0 - DIREC\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/direc.dk\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/Quantum-Secure-Cryptography.jpg\",\"datePublished\":\"2025-10-25T09:00:06+00:00\",\"dateModified\":\"2026-05-04T12:15:38+00:00\",\"description\":\"Databases track information, move it back and forth, and ensure seamless integration across systems\u2014but all of this consumes energy. A lot of energy. What if it could be done more efficiently?\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#breadcrumb\"},\"inLanguage\":\"da-DK\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"da-DK\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#primaryimage\",\"url\":\"https:\\\/\\\/direc.dk\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/Quantum-Secure-Cryptography.jpg\",\"contentUrl\":\"https:\\\/\\\/direc.dk\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/Quantum-Secure-Cryptography.jpg\",\"width\":1920,\"height\":1080},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/direc.dk\\\/da\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#website\",\"url\":\"https:\\\/\\\/direc.dk\\\/da\\\/\",\"name\":\"DIREC\",\"description\":\"Digital Research Centre Denmark\",\"publisher\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/direc.dk\\\/da\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"da-DK\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#organization\",\"name\":\"DIREC\",\"url\":\"https:\\\/\\\/direc.dk\\\/da\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"da-DK\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/direc.dk\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/DIREC_logo_2023_bla.png\",\"contentUrl\":\"https:\\\/\\\/direc.dk\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/DIREC_logo_2023_bla.png\",\"width\":2786,\"height\":786,\"caption\":\"DIREC\"},\"image\":{\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/direc.dk\\\/da\\\/#\\\/schema\\\/person\\\/3fcdff2b9bc83fcb7b642fa67a946f38\",\"name\":\"Susanne Br\u00f8ndberg\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"da-DK\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e8d2e418b1a0402f1ebb3e45dc93b7b681ec163ec692e71cb65c848ff80d3ab7?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e8d2e418b1a0402f1ebb3e45dc93b7b681ec163ec692e71cb65c848ff80d3ab7?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e8d2e418b1a0402f1ebb3e45dc93b7b681ec163ec692e71cb65c848ff80d3ab7?s=96&d=mm&r=g\",\"caption\":\"Susanne Br\u00f8ndberg\"},\"url\":\"https:\\\/\\\/direc.dk\\\/da\\\/author\\\/susanne\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0 - DIREC","description":"Databases track information, move it back and forth, and ensure seamless integration across systems\u2014but all of this consumes energy. A lot of energy. What if it could be done more efficiently?","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:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/","og_locale":"da_DK","og_type":"article","og_title":"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0 - DIREC","og_description":"Databases track information, move it back and forth, and ensure seamless integration across systems\u2014but all of this consumes energy. A lot of energy. What if it could be done more efficiently?","og_url":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/","og_site_name":"DIREC","article_published_time":"2025-10-25T09:00:06+00:00","article_modified_time":"2026-05-04T12:15:38+00:00","og_image":[{"width":1920,"height":1080,"url":"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Quantum-Secure-Cryptography.jpg","type":"image\/jpeg"}],"author":"Susanne Br\u00f8ndberg","twitter_card":"summary_large_image","twitter_misc":{"Skrevet af":"Susanne Br\u00f8ndberg","Estimeret l\u00e6setid":"3 minutter"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#article","isPartOf":{"@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/"},"author":{"name":"Susanne Br\u00f8ndberg","@id":"https:\/\/direc.dk\/da\/#\/schema\/person\/3fcdff2b9bc83fcb7b642fa67a946f38"},"headline":"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0","datePublished":"2025-10-25T09:00:06+00:00","dateModified":"2026-05-04T12:15:38+00:00","mainEntityOfPage":{"@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/"},"wordCount":156,"publisher":{"@id":"https:\/\/direc.dk\/da\/#organization"},"image":{"@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#primaryimage"},"thumbnailUrl":"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Quantum-Secure-Cryptography.jpg","keywords":["Next gen cybersecurity"],"articleSection":["Cybersikkerhed","Projekt"],"inLanguage":"da-DK"},{"@type":"WebPage","@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/","url":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/","name":"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0 - DIREC","isPartOf":{"@id":"https:\/\/direc.dk\/da\/#website"},"primaryImageOfPage":{"@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#primaryimage"},"image":{"@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#primaryimage"},"thumbnailUrl":"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Quantum-Secure-Cryptography.jpg","datePublished":"2025-10-25T09:00:06+00:00","dateModified":"2026-05-04T12:15:38+00:00","description":"Databases track information, move it back and forth, and ensure seamless integration across systems\u2014but all of this consumes energy. A lot of energy. What if it could be done more efficiently?","breadcrumb":{"@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#breadcrumb"},"inLanguage":"da-DK","potentialAction":[{"@type":"ReadAction","target":["https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/"]}]},{"@type":"ImageObject","inLanguage":"da-DK","@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#primaryimage","url":"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Quantum-Secure-Cryptography.jpg","contentUrl":"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Quantum-Secure-Cryptography.jpg","width":1920,"height":1080},{"@type":"BreadcrumbList","@id":"https:\/\/direc.dk\/da\/threshold-key-management-in-the-post-quantum-era-kvantesikker-kryptografi\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/direc.dk\/da\/"},{"@type":"ListItem","position":2,"name":"Threshold Key Management in the Post-Quantum Era: Kvantesikker kryptografi\u00a0"}]},{"@type":"WebSite","@id":"https:\/\/direc.dk\/da\/#website","url":"https:\/\/direc.dk\/da\/","name":"DIREC","description":"Digital Research Centre Denmark","publisher":{"@id":"https:\/\/direc.dk\/da\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/direc.dk\/da\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"da-DK"},{"@type":"Organization","@id":"https:\/\/direc.dk\/da\/#organization","name":"DIREC","url":"https:\/\/direc.dk\/da\/","logo":{"@type":"ImageObject","inLanguage":"da-DK","@id":"https:\/\/direc.dk\/da\/#\/schema\/logo\/image\/","url":"https:\/\/direc.dk\/wp-content\/uploads\/2021\/02\/DIREC_logo_2023_bla.png","contentUrl":"https:\/\/direc.dk\/wp-content\/uploads\/2021\/02\/DIREC_logo_2023_bla.png","width":2786,"height":786,"caption":"DIREC"},"image":{"@id":"https:\/\/direc.dk\/da\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/direc.dk\/da\/#\/schema\/person\/3fcdff2b9bc83fcb7b642fa67a946f38","name":"Susanne Br\u00f8ndberg","image":{"@type":"ImageObject","inLanguage":"da-DK","@id":"https:\/\/secure.gravatar.com\/avatar\/e8d2e418b1a0402f1ebb3e45dc93b7b681ec163ec692e71cb65c848ff80d3ab7?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/e8d2e418b1a0402f1ebb3e45dc93b7b681ec163ec692e71cb65c848ff80d3ab7?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e8d2e418b1a0402f1ebb3e45dc93b7b681ec163ec692e71cb65c848ff80d3ab7?s=96&d=mm&r=g","caption":"Susanne Br\u00f8ndberg"},"url":"https:\/\/direc.dk\/da\/author\/susanne\/"}]}},"dynamic_page_title":"","dynamic_page_description":"Klassisk kryptografi handler basalt set om sikker h\u00e5ndtering af hemmelige n\u00f8gler. Sikkerheden st\u00e5r og falder med, at en st\u00e6rk, hemmelig n\u00f8gle forbliver gemt for fjenden, men tilg\u00e6ngelig for brugeren. Men hvad hvis kvantecomputeren med sin gigantiske regnekraft kompromitterer den klassiske kryptografi? <br><br>I kvante\u00e6raen vil computere kunne l\u00f8se matematiske problemer meget hurtigere end i dag. Derfor er post-kvante-kryptografi (PQ) bydende n\u00f8dvendigt. Udfordringen er at f\u00e5 de nye PQ-metoder til at fungere lige s\u00e5 smidigt som den nuv\u00e6rende kryptografi. <br><br>Det er her projektet tager sin begyndelse. Threshold-baseret n\u00f8gleh\u00e5ndtering, hvor n\u00f8gler deles af flere brugere, skal g\u00f8res klar til den kommende kvantevirkelighed.  <br><br>I dette samarbejde vil AU og den danskledede virksomhed Blockdaemon sikre, at myndigheder, banker og kritisk infrastruktur kan operere i sikkerhed, n\u00e5r kvante\u00e6raen banker p\u00e5 d\u00f8ren. ","dynamic_page_partners":"\n <div style=\"text-align: left;margin: 20px 0\">\n <div style=\"max-width: 100%\">\n <img src=\"https:\/\/direc.dk\/wp-content\/uploads\/2020\/11\/aulogo_uk_var2_blue.png\" alt=\"Aarhus University logo\" style=\"height: 75px;width: auto;min-width: 75px;max-width: 200px;object-fit: contain;margin: 0 25px 25px 0;vertical-align: middle\" \/><img src=\"https:\/\/direc.dk\/wp-content\/uploads\/2025\/12\/Blockdaemon-Primary-Purple.png\" alt=\"Blockdaemon logo\" style=\"height: 75px;width: auto;min-width: 75px;max-width: 200px;object-fit: contain;margin: 0 25px 25px 0;vertical-align: middle\" \/>\n <\/div>\n <\/div>\n ","dynamic_page_scientific_impact":"Projektet er opdelt i tre spor. F\u00f8rst etableres et sammenligningsgrundlag via feasibility-analyse og performance-benchmarks, som tr\u00e6kker p\u00e5 AU\u2019s lange tradition for klassisk kryptologi. <br><br>Dern\u00e6st etableres reglerne for, hvordan en digital underskrift kan laves af flere i f\u00e6llesskab. Metoden bygger p\u00e5 gitre, som er sv\u00e6rt at hacke - ogs\u00e5 med fremtidige kvantecomputere.  <br><br>Med MPC-in-the-Head-metoden konstrueres en delbar underskrift offline, som kan testes og forbedres. Det smart bevis skal i sidste ende g\u00f8res lille og effektivt, s\u00e5 det kan verificeres med standardv\u00e6rkt\u00f8jer i virkelighedens kommercielle systemer. <br><br>Protokoller og sikkerhedsanalyser bliver omsat til prototyper, som Blockdaemon integrerer. M\u00e5let er, at enterprise-kunder vil kunne migrere til threshold-n\u00f8gler, som er sikre langt ude i fremtiden.","dynamic_page_people":"\n <table style=\"width: 100%;border-collapse: collapse;margin: 20px 0;border: none;background: none\">\n <tbody style=\"border: none;background: none\">\n \n <tr>\n <td style=\"padding: 12px;text-align: center;vertical-align: top;border: none;background: none\">\n <div class=\"researcher-photo\"><img src=\"https:\/\/users-cs.au.dk\/orlandi\/img\/2023-square-web.jpg\" alt=\"Claudio Orlandi\" style=\"width: 80px;height: 80px;min-width: 80px;min-height: 80px;border-radius: 50%;object-fit: cover;border: 2px solid #ddd;display: block;margin: 0 auto;max-width: 100%\" \/><\/div>\n <\/td>\n <td style=\"padding: 12px;vertical-align: top;border: none;background: none\">\n <div class=\"participant-name\" style=\"font-weight: normal;font-size: 18px;color: #1C2966\">Claudio Orlandi - Professor - Aarhus University<\/div>\n <\/td>\n <\/tr>\n \n <tr>\n <td style=\"padding: 12px;text-align: center;vertical-align: top;border: none;background: none\">\n <div class=\"researcher-photo\"><img src=\"https:\/\/ipure8.au.dk\/current\/photos\/77bd8f14-08da-486c-88d9-c20f6d1755e3-new.jpg\" alt=\"Sebastian Kolby\" style=\"width: 80px;height: 80px;min-width: 80px;min-height: 80px;border-radius: 50%;object-fit: cover;border: 2px solid #ddd;display: block;margin: 0 auto;max-width: 100%\" \/><\/div>\n <\/td>\n <td style=\"padding: 12px;vertical-align: top;border: none;background: none\">\n <div class=\"participant-name\" style=\"font-weight: normal;font-size: 18px;color: #1C2966\">Sebastian Kolby - Post Doc - Aarhus University<\/div>\n <\/td>\n <\/tr>\n \n <tr>\n <td style=\"padding: 12px;text-align: center;vertical-align: top;border: none;background: none\">\n <div class=\"researcher-photo\"><img src=\"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Jakob-Pagter.jpg\" alt=\"Jakob Pagter\" style=\"width: 80px;height: 80px;min-width: 80px;min-height: 80px;border-radius: 50%;object-fit: cover;border: 2px solid #ddd;display: block;margin: 0 auto;max-width: 100%\" \/><\/div>\n <\/td>\n <td style=\"padding: 12px;vertical-align: top;border: none;background: none\">\n <div class=\"participant-name\" style=\"font-weight: normal;font-size: 18px;color: #1C2966\">Jakob Pagter - VP of Engineering, Wallet Security - Blockdaemon<\/div>\n <\/td>\n <\/tr>\n \n <tr>\n <td style=\"padding: 12px;text-align: center;vertical-align: top;border: none;background: none\">\n <div class=\"researcher-photo\"><img src=\"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Michael_baeksvang.png\" alt=\"Michael B\u00e6ksvang \u00d8stergaard\" style=\"width: 80px;height: 80px;min-width: 80px;min-height: 80px;border-radius: 50%;object-fit: cover;border: 2px solid #ddd;display: block;margin: 0 auto;max-width: 100%\" \/><\/div>\n <\/td>\n <td style=\"padding: 12px;vertical-align: top;border: none;background: none\">\n <div class=\"participant-name\" style=\"font-weight: normal;font-size: 18px;color: #1C2966\">Michael B\u00e6ksvang \u00d8stergaard - Staff Engineer, Security - Blockdaemon<\/div>\n <\/td>\n <\/tr>\n \n <tr>\n <td style=\"padding: 12px;text-align: center;vertical-align: top;border: none;background: none\">\n <div class=\"researcher-photo\"><img src=\"https:\/\/direc.dk\/wp-content\/uploads\/2025\/10\/Thomas-Jakobsen.png\" alt=\"Thomas P. Jakobsen\" style=\"width: 80px;height: 80px;min-width: 80px;min-height: 80px;border-radius: 50%;object-fit: cover;border: 2px solid #ddd;display: block;margin: 0 auto;max-width: 100%\" \/><\/div>\n <\/td>\n <td style=\"padding: 12px;vertical-align: top;border: none;background: none\">\n <div class=\"participant-name\" style=\"font-weight: normal;font-size: 18px;color: #1C2966\">Thomas P. Jakobsen - Senior Cryptography Engineer - Blockdaemon<\/div>\n <\/td>\n <\/tr>\n \n <\/tbody>\n <\/table>\n ","dynamic_page_project_period":"2025-2027","dynamic_page_funding":"DKK 2.000.000","dynamic_page_publications":"","dynamic_page_cover_image":"https:\/\/direc.dk\/wp-content\/uploads\/2021\/02\/AdobeStock_253831649-300x182.jpg","_links":{"self":[{"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/posts\/38492","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/comments?post=38492"}],"version-history":[{"count":3,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/posts\/38492\/revisions"}],"predecessor-version":[{"id":39667,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/posts\/38492\/revisions\/39667"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/media\/38485"}],"wp:attachment":[{"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/media?parent=38492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/categories?post=38492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/direc.dk\/da\/wp-json\/wp\/v2\/tags?post=38492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}