{"id":255,"date":"2021-02-19T13:28:49","date_gmt":"2021-02-19T12:28:49","guid":{"rendered":"https:\/\/perso.lirmm.fr\/ahmed-chemori\/?page_id=255"},"modified":"2026-03-10T15:17:38","modified_gmt":"2026-03-10T14:17:38","slug":"accueil","status":"publish","type":"page","link":"https:\/\/www.lirmm.fr\/lucas-ottow\/","title":{"rendered":"Accueil"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"255\" class=\"elementor elementor-255\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3c7ca1d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3c7ca1d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-5098882\" data-id=\"5098882\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1be963d elementor-widget elementor-widget-heading\" data-id=\"1be963d\" 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\">About<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ea8ed2 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"7ea8ed2\" 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>I am a PhD student in the <a href=\"https:\/\/www.lirmm.fr\/eco\/\">ECO<\/a> team of the <a href=\"https:\/\/www.lirmm.fr\/\">LIRMM<\/a>, in Montpellier, France. I am under the supervision of <a href=\"https:\/\/www.lirmm.fr\/~giorgi\/\">Pascal Giorgi<\/a>, <a href=\"https:\/\/www.lirmm.fr\/~laguillaum\/\">Fabien Laguillaumie<\/a>, and <a href=\"https:\/\/perso.lip6.fr\/Damien.Vergnaud\/\">Damien Vergnaud<\/a>.<\/p><p>My research focuses on cryptography, more specifically Multi-Party Computation (MPC). My main topic of interest is studying how can Computer Algebra be used in order to design or improve solutions for MPC problems. I&rsquo;ve worked for example on variants of the Private Set Intersection problem. I am also interested in error-correcting codes and their applications in cryptography.<\/p><p>I am part of the <a href=\"https:\/\/www.womenincryptography.com\/\">Women in Cryptography Association<\/a>. In June 2025, I helped organized the <a href=\"https:\/\/decryptingdiversity.com\/\">Decrypting Diversity Summit<\/a> in Montpellier, whose goal was to promote diversity in all its forms in the cryptography community.<\/p><p>Previously, I was a student at the <a href=\"https:\/\/ens-paris-saclay.fr\/\">ENS Paris-Saclay<\/a>, where I obtained my <a href=\"https:\/\/mpri-master.ens.fr\/\">MPRI<\/a> master&rsquo;s degree, and passed the math <a href=\"https:\/\/agreg.org\/\">\u00ab\u00a0agr\u00e9gation\u00a0\u00bb<\/a>.<\/p>\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<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-69208f4\" data-id=\"69208f4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9b7c5cd elementor-widget elementor-widget-heading\" data-id=\"9b7c5cd\" 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\">Contact<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c20f68f elementor-widget elementor-widget-text-editor\" data-id=\"c20f68f\" 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>Mail: lucas &lt;dot&gt; ottow &lt;at&gt; lirmm &lt;dot&gt; fr<\/p>\n<p>office 2.10<br>LIRMM, building 4<br>161 rue Ada<br>F-34095 Montpellier<br>\nFrance<\/p>\n<p><\/p>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-05c2fcb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"05c2fcb\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-554987c\" data-id=\"554987c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5ebbd72 elementor-widget elementor-widget-heading\" data-id=\"5ebbd72\" 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\">Publications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e370520 elementor-widget elementor-widget-text-editor\" data-id=\"e370520\" 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<h5>2026<\/h5><ul><li><strong>Threshold Niederreiter: Chosen-Ciphertext Security and Improved Distributed Decoding<\/strong><div>Pascal Giorgi, Fabien Laguillaumie, Lucas Ottow, Damien Vergnaud<\/div><p><em><i><a href=\"https:\/\/link.springer.com\/journal\/10623\">Designs, Codes and Cryptography<\/a><\/i> &#8211; Volume 94, 64 (2026).<br \/><\/em><a href=\"https:\/\/eprint.iacr.org\/2025\/757\">[Eprint]<\/a> &#8211; <a href=\"https:\/\/rdcu.be\/e6dmI\">[Springer]<\/a><\/p><\/li><\/ul><h5>2024<\/h5><ul><li><strong>Fast Secure Computations on Shared Polynomials and Applications to Private Set Operations<\/strong><div>Pascal Giorgi, Fabien Laguillaumie, Lucas Ottow, Damien Vergnaud<\/div><p><em><a href=\"https:\/\/itcrypto.github.io\/2024\/index.html\">ITC 2024<\/a><\/em><i> &#8211; 5th Information-Theoretic Cryptography Conference<\/i>, Aug 2024, Stanford, CA, United States.<br \/><a href=\"https:\/\/eprint.iacr.org\/2024\/470\">[Eprint]<\/a> &#8211; <a href=\"https:\/\/doi.org\/10.4230\/LIPIcs.ITC.2024.11\">[Dagsthul]<\/a><\/p><\/li><\/ul>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4cea2dd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4cea2dd\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6f0ef64\" data-id=\"6f0ef64\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0e698b7 elementor-widget elementor-widget-heading\" data-id=\"0e698b7\" 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\">Teaching<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c149260 elementor-widget elementor-widget-text-editor\" data-id=\"c149260\" 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<h5>2025-2026<\/h5>\n<ul>\n<li>HAI720I Programmation Algorithmique Efficace: TD\/TP en M1<\/li>\n<li>HAI507I Calcul Formel: Cours Magistraux et TP en L3<\/li>\n<\/ul><h5>2024-2025<\/h5>\n<ul>\n<li>HAI303I Syst\u00e8me: TD\/TP en L2<\/li>\n<li>HAI507I Calcul Formel: TP en L3<\/li>\n<\/ul>\n<h5>2023-2024<\/h5>\n<ul>\n<li>HAI202I Programmation C: TD et TP en L1<\/li>\n<li>HAI201I Algorithmique 2: TP en L1<\/li>\n<\/ul>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-41361f0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"41361f0\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-80ee1aa\" data-id=\"80ee1aa\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bd98473 elementor-widget elementor-widget-heading\" data-id=\"bd98473\" 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\">Positions and Interships<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b2bffef elementor-widget elementor-widget-text-editor\" data-id=\"b2bffef\" 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<ul><li><strong>M2 Internship (Spring-Summer 2023), PhD student (2023-)<br \/><\/strong>Supervised by <a href=\"https:\/\/www.lirmm.fr\/~giorgi\/\">Pascal Giorgi<\/a>, <a href=\"https:\/\/www.lirmm.fr\/~laguillaum\/\">Fabien Laguillaumie<\/a>, and <a href=\"https:\/\/www-almasty.lip6.fr\/~vergnaud\/\">Damien Vergnaud<\/a>.<br \/><a href=\"https:\/\/www.lirmm.fr\/eco\/\">ECO Team<\/a>, <a href=\"https:\/\/www.lirmm.fr\/\">LIRMM<\/a><\/li><li><strong>M1 Internship (Summer 2021)<br \/><\/strong>Supervised by <a href=\"https:\/\/www.lirmm.fr\/~giorgi\/\">Pascal Giorgi<\/a>, and <a href=\"https:\/\/membres-ljk.imag.fr\/Bruno.Grenet\/home.html\">Bruno Grenet<\/a>.<br \/><a href=\"https:\/\/www.lirmm.fr\/eco\/\">ECO Team<\/a>, <a href=\"https:\/\/www.lirmm.fr\/\">LIRMM<\/a><\/li><\/ul><ul><li><strong>Bachelor&rsquo;s Internship (Summer 2020)<br \/><\/strong>Supervised by <a href=\"https:\/\/langloi227.users.greyc.fr\/\">Adeline Roux-Langlois<\/a>.<br \/><a href=\"https:\/\/team.inria.fr\/capsule\/\">EMSEC (CAPSULE) Team<\/a>, <a href=\"https:\/\/www.irisa.fr\/\">IRISA Rennes<\/a><\/li><li><strong>Student (Normalien \u00e9l\u00e8ve) (2019-2023)<\/strong><br \/>Computer Science department of <a href=\"https:\/\/ens-paris-saclay.fr\/\">ENS Paris-Saclay<\/a><\/li><\/ul>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>About I am a PhD student in the ECO team of the LIRMM, in Montpellier, France. I am under the supervision of Pascal Giorgi, Fabien Laguillaumie, and Damien Vergnaud. My research focuses on cryptography, more specifically Multi-Party Computation (MPC). My main topic of interest is studying how can Computer Algebra be used in order to [&hellip;]<\/p>\n","protected":false},"author":35,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_crdt_document":"","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-255","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"Perso Admin","author_link":"https:\/\/www.lirmm.fr\/lucas-ottow\/author\/lirmmperso\/"},"uagb_comment_info":0,"uagb_excerpt":"About I am a PhD student in the ECO team of the LIRMM, in Montpellier, France. I am under the supervision of Pascal Giorgi, Fabien Laguillaumie, and Damien Vergnaud. My research focuses on cryptography, more specifically Multi-Party Computation (MPC). My main topic of interest is studying how can Computer Algebra be used in order to\u2026","_links":{"self":[{"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/pages\/255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/users\/35"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/comments?post=255"}],"version-history":[{"count":21,"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/pages\/255\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/pages\/255\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.lirmm.fr\/lucas-ottow\/wp-json\/wp\/v2\/media?parent=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}