{"id":2740,"date":"2025-07-09T15:45:27","date_gmt":"2025-07-09T22:45:27","guid":{"rendered":"https:\/\/self-issued.info\/?p=2740"},"modified":"2025-07-09T15:45:27","modified_gmt":"2025-07-09T22:45:27","slug":"split-signing-algorithms-for-cose-and-arkg-updated-in-preparation-for-ietf-123","status":"publish","type":"post","link":"https:\/\/self-issued.info\/?p=2740","title":{"rendered":"&#8220;Split Signing Algorithms for COSE&#8221; and &#8220;ARKG&#8221; updated in preparation for IETF 123"},"content":{"rendered":"<p><span class=\"plain\"><img decoding=\"async\" align=\"right\" src=\"https:\/\/self-issued.info\/images\/ietf-logo.png\" alt=\"IETF logo\"><\/span><\/span>Emil Lundberg and I have published the <a href=\"https:\/\/datatracker.ietf.org\/doc\/draft-lundberg-cose-two-party-signing-algs\/\">Split Signing Algorithms for COSE<\/a> specification.  This is an update to the spec formerly called <a href=\"https:\/\/self-issued.info\/?p=2621\">COSE Algorithms for Two-Party Signing<\/a>.  The new draft incorporates feedback received during IETF 122, preparing for discussions at <a href=\"https:\/\/www.ietf.org\/meeting\/123\/\">IETF 123 in Madrid<\/a>.<\/p>\n<p>As recorded in the <a href=\"https:\/\/www.ietf.org\/archive\/id\/draft-lundberg-cose-two-party-signing-algs-02.html#name-document-history\">History entries<\/a>, the changes made were:<\/p>\n<ul>\n<li>Renamed document from &#8220;COSE Algorithms for Two-Party Signing&#8221; to &#8220;Split signing algorithms for COSE&#8221; and updated introduction and terminology accordingly.<\/li>\n<li>Dropped definitions for HashML-DSA, as split variants of ML-DSA are being actively discussed in other IETF groups.<\/li>\n<li>Changed &#8220;Base algorithm&#8221; heading in definition tables to &#8220;Verification algorithm&#8221;.<\/li>\n<li>Remodeled COSE_Key_Ref as COSE_Sign_Args.<\/li>\n<li>Dropped definitions of reference types for COSE Key Types registry.<\/li>\n<\/ul>\n<p>Emil also published an update to the <a href=\"https:\/\/datatracker.ietf.org\/doc\/draft-bradleylundberg-cfrg-arkg\/\">Asynchronous Remote Key Generation (ARKG)<\/a> specification, with some assistance from me.  See the <a href=\"https:\/\/www.ietf.org\/archive\/id\/draft-lundberg-cose-two-party-signing-algs-02.html#name-document-history\">History entries<\/a> there for details of the updates made.  Some of the changes made were for alignment with the Split Signing Algorithms specification.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Emil Lundberg and I have published the Split Signing Algorithms for COSE specification. This is an update to the spec formerly called COSE Algorithms for Two-Party Signing. The new draft incorporates feedback received during IETF 122, preparing for discussions at IETF 123 in Madrid. As recorded in the History entries, the changes made were: Renamed [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29,28,32,25],"tags":[],"class_list":["post-2740","post","type-post","status-publish","format-standard","hentry","category-cbor","category-cryptography","category-ietf","category-specifications"],"_links":{"self":[{"href":"https:\/\/self-issued.info\/index.php?rest_route=\/wp\/v2\/posts\/2740","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/self-issued.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/self-issued.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/self-issued.info\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/self-issued.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2740"}],"version-history":[{"count":1,"href":"https:\/\/self-issued.info\/index.php?rest_route=\/wp\/v2\/posts\/2740\/revisions"}],"predecessor-version":[{"id":2741,"href":"https:\/\/self-issued.info\/index.php?rest_route=\/wp\/v2\/posts\/2740\/revisions\/2741"}],"wp:attachment":[{"href":"https:\/\/self-issued.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/self-issued.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/self-issued.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}