{"id":2330,"date":"2025-10-19T22:33:28","date_gmt":"2025-10-19T22:33:28","guid":{"rendered":"https:\/\/elink.cat\/blog\/?p=2330"},"modified":"2025-10-19T09:43:15","modified_gmt":"2025-10-19T09:43:15","slug":"marques-daigua","status":"publish","type":"post","link":"https:\/\/elink.cat\/blog\/marques-daigua\/","title":{"rendered":"Marques d\u2019aigua i IA: seguretat o simulacre de transpar\u00e8ncia?"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Temps de lectura: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minuts<\/span><\/span><h2><\/h2>\n<p class=\"p1\">Hi ha una nova mania a la ind\u00fastria de la IA: posar marques d\u2019aigua digitals a tot el que es genera. Fotos, v\u00eddeos, \u00e0udios\u2026 Tot hauria de portar el seu segell \u201cmade by AI\u201d. Sona responsable, oi? Per\u00f2, com passa sovint, darrere d\u2019una bona intenci\u00f3 s\u2019hi amaga un m\u00f3n de contradiccions t\u00e8cniques, pol\u00edtiques i fins i tot filos\u00f2fiques.<\/p>\n<p class=\"p1\">La idea \u00e9s senzilla: si saps que una imatge prov\u00e9 d\u2019un model generatiu, no la confondr\u00e0s amb una fotografia real. Si cada contingut sint\u00e8tic queda marcat, pots tra\u00e7ar-ne l\u2019origen, exigir responsabilitats i mantenir un cert ordre digital. El problema \u00e9s que, com en tantes croades de la tecnologia, la implementaci\u00f3 real no est\u00e0 a l\u2019altura del discurs.<\/p>\n<h3><b>L\u2019AI Act i el nou mandat europeu: \u201cmarca o multa\u201d<\/b><\/h3>\n<p class=\"p1\">La Uni\u00f3 Europea ha decidit que totes les plataformes d\u2019IA que generin continguts visuals o audiovisuals han d\u2019incloure <a href=\"https:\/\/www.europarl.europa.eu\/RegData\/etudes\/BRIE\/2023\/757583\/EPRS_BRI%282023%29757583_EN.pdf\" target=\"_blank\" rel=\"noopener\"><span class=\"s1\"><b>marques d\u2019aigua detectables per una m\u00e0quina<\/b><\/span>.<\/a> \u00c9s el que estableix l\u2019<a href=\"https:\/\/artificialintelligenceact.eu\/article\/50\/\" target=\"_blank\" rel=\"noopener\">article 50 de l\u2019AI Act<\/a>, un text que converteix la transpar\u00e8ncia en obligaci\u00f3 legal.<\/p>\n<p class=\"p1\">A primera vista, \u00e9s una gran not\u00edcia: el <em>watermarking<\/em> esdev\u00e9 una eina per combatre la desinformaci\u00f3 i identificar <i>deepfakes<\/i>. Per\u00f2 la realitat t\u00e8cnica \u00e9s menys glamurosa. Un estudi recent (<a href=\"https:\/\/arxiv.org\/abs\/2503.18156\" target=\"_blank\" rel=\"noopener\"><i>Adoption of Watermarking for Generative AI Systems<\/i><\/a>) analitza cinquanta plataformes d\u2019imatge IA: menys del 30 % implementen marques robustes, i la majoria poden eliminar-se simplement retallant, recomprimint o reenviant la imatge.<\/p>\n<p class=\"p1\">\u00c9s a dir, tenim una norma avan\u00e7ada sobre una tecnologia que encara no est\u00e0 preparada per complir-la.<\/p>\n<h3><b>Els avantatges que no podem ignorar<\/b><\/h3>\n<p class=\"p1\">Tot i aix\u00ed, el <em>watermarking<\/em> t\u00e9 m\u00e8rits innegables. D\u2019una banda, aporta <span class=\"s1\"><b>tra\u00e7abilitat<\/b><\/span><span class=\"s1\"><b>\u00a0i autoria<\/b><\/span>, dos conceptes gaireb\u00e9 desapareguts en l\u2019era del contingut sint\u00e8tic. D\u2019altra, ofereix un mecanisme senzill perqu\u00e8 les plataformes (i els usuaris) <span class=\"s1\"><b>filtrin continguts dubtosos<\/b><\/span>.<\/p>\n<p class=\"p1\">Tamb\u00e9 t\u00e9 valor educatiu: si la gent comen\u00e7a a veure que les imatges \u201cperfectes\u201d provenen d\u2019una IA, pot aprendre a mirar-les amb m\u00e9s esperit cr\u00edtic. I des del punt de vista legal, \u00e9s un paraigua: els prove\u00efdors poden demostrar que han complert la norma i evitar sancions.<\/p>\n<p class=\"p1\">Per\u00f2\u2026 i sempre hi ha un \u201cper\u00f2\u201d&#8230; el watermarking \u00e9s, de moment, <span class=\"s1\"><b>una defensa simb\u00f2lica m\u00e9s que efectiva<\/b><\/span>.<\/p>\n<h3><b>El miratge de la seguretat t\u00e8cnica<\/b><\/h3>\n<p class=\"p1\">El gran risc \u00e9s caure en la <span class=\"s1\"><b>il\u00b7lusi\u00f3 de control<\/b>, \u00e9s a dir, c<\/span>reure que, perqu\u00e8 hi ha una marca d\u2019aigua, ja hi ha transpar\u00e8ncia. En realitat, les marques poden ser manipulades, imitades o esborrades amb sorprenent facilitat. En un estudi de Meta i Google sobre <i>robust watermarks<\/i>, es va demostrar que un simple pas per una eina d\u2019edici\u00f3 o una IA d\u2019estilitzaci\u00f3 pot eliminar-les sense deixar rastre visible.<\/p>\n<p class=\"p1\">A m\u00e9s, cada prove\u00efdor utilitza el seu propi sistema (no hi ha est\u00e0ndard com\u00fa), de manera que detectar una marca de DALL-E no serveix per a Midjourney o Runway. \u00c9s com tenir passaports diferents per cada pa\u00eds per\u00f2 sense policia de frontera que els reconegui. El resultat \u00e9s una <span class=\"s1\"><b>fragmentaci\u00f3 del control<\/b><\/span>: moltes marques, pocs verificadors.<\/p>\n<h3><b>El dilema de la confian\u00e7a<\/b><\/h3>\n<p class=\"p1\">Aqu\u00ed \u00e9s on el debat es torna interessant. Les marques d\u2019aigua no nom\u00e9s s\u00f3n una q\u00fcesti\u00f3 t\u00e8cnica, sin\u00f3 <span class=\"s1\"><b>cultural i pol\u00edtica<\/b><\/span>. Marcar el contingut \u00e9s una manera de dir: \u201caix\u00f2 \u00e9s artificial, per tant cal desconfiar\u201d. Per\u00f2\u2026 qu\u00e8 passa quan la majoria d\u2019imatges del nostre entorn (publicitat, cinema, contingut educatiu) provenen d\u2019una IA? Si tot est\u00e0 marcat, la marca perd valor. El watermarking corre el risc de convertir-se en <span class=\"s1\"><b>una etiqueta universal d\u2019irrellev\u00e0ncia<\/b><\/span>, com el \u201cfet amb ordinador\u201d dels anys 90.<\/p>\n<p class=\"p1\">A m\u00e9s, hi ha un risc d\u2019<span class=\"s1\"><b>asimetria<\/b><\/span>: les grans empreses poden aplicar marques sofisticades, per\u00f2 les eines open-source o independents no. El resultat podria ser un nou monopoli de \u201ccontingut verificat\u201d dominat per uns pocs prove\u00efdors.<\/p>\n<h3><b>Cap a una nova ecologia de la transpar\u00e8ncia<\/b><\/h3>\n<p class=\"p1\">No estic en contra del watermarking ,de fet, \u00e9s necessari, per\u00f2 crec que <span class=\"s1\"><b>no n\u2019hi ha prou<\/b><\/span>. Cal una estrat\u00e8gia combinada:<\/p>\n<ul>\n<li class=\"p1\">Metadades digitals segures (com C2PA o Content Credentials).<\/li>\n<li class=\"p1\">Signatures criptogr\u00e0fiques verificables.<\/li>\n<li class=\"p1\">Auditories externes i obertura d\u2019est\u00e0ndards.<\/li>\n<li class=\"p1\">Educaci\u00f3 medi\u00e0tica real: ensenyar a la gent a recon\u00e8ixer patrons, fonts i contextos.<\/li>\n<\/ul>\n<p class=\"p1\">Crec que per guanyar transpar\u00e8ncia no nom\u00e9s cal posar una etiqueta, sin\u00f3 que la gent <span class=\"s1\"><b>entengui el proc\u00e9s<\/b><\/span>. I aix\u00f2 no s\u2019aconsegueix amb un p\u00edxel amagat, tornem al de sempre&#8230;educaci\u00f3, educaci\u00f3 i educaci\u00f3.<\/p>\n<h3><b>El futur immediat<\/b><\/h3>\n<p class=\"p1\">\u00c9s probable que el watermarking acabi sent una <span class=\"s1\"><b>condici\u00f3 m\u00ednima per operar a Europa<\/b><\/span>, com l\u2019etiquetatge nutricional en els aliments. Per\u00f2, com en el menjar processat, el fet que porti una etiqueta no vol dir que sigui saludable. Les empreses d\u2019IA que vulguin guanyar confian\u00e7a hauran d\u2019anar m\u00e9s enll\u00e0: mostrar com s\u2019entrenen els models, qui en controla les dades, i com es revisen els resultats. La marca d\u2019aigua pot ser la porta d\u2019entrada a aquesta nova cultura de la rendici\u00f3 de comptes, per\u00f2 nom\u00e9s si va acompanyada de <span class=\"s1\"><b>tra\u00e7abilitat real i auditories obertes<\/b><\/span>.<\/p>\n<p class=\"p1\">El watermarking \u00e9s un bon principi, no una fi. Ens ajuda a comen\u00e7ar a distingir el que \u00e9s hum\u00e0 del que \u00e9s sint\u00e8tic, per\u00f2 no a entendre-ho. Si el fem servir com a escut regulatori, ser\u00e0 paper mullat. Si l\u2019utilitzem com a base per construir confian\u00e7a, pot esdevenir el <span class=\"s1\"><b>nou DNI del contingut digital<\/b><\/span>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Temps de lectura: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minuts<\/span><\/span>Hi ha una nova mania a la ind\u00fastria de la IA: posar marques d\u2019aigua digitals a tot el que es genera. Fotos, v\u00eddeos, \u00e0udios\u2026 Tot hauria de portar el seu<\/p>\n","protected":false},"author":1,"featured_media":2332,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","breadcrumbs_single_post":"","page_title_panel":"","breadcrumbs_single_page":"","single_page_alignment":"","single_page_margin":"","page_structure_type":"","content_style_source":"","content_style":"","blog_post_streched_ed":"","blog_page_streched_ed":"","has_transparent_header":"","disable_transparent_header":"","vertical_spacing_source":"","content_area_spacing":"","single_post_content_background":"","single_page_content_background":"","single_post_boxed_content_spacing":"","single_page_boxed_content_spacing":"","single_post_content_boxed_radius":"","single_page_content_boxed_radius":"","disable_featured_image":"","disable_post_tags":"","disable_author_box":"","disable_posts_navigation":"","disable_comments":"","disable_related_posts":"","disable_header":"","disable_footer":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-2330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tendencies","rishi-post"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Marques d\u2019aigua i IA: seguretat o simulacre de transpar\u00e8ncia? - Blog Elinkcat<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/elink.cat\/blog\/marques-daigua\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Marques d\u2019aigua i IA: seguretat o simulacre de transpar\u00e8ncia? - Blog Elinkcat\" \/>\n<meta property=\"og:description\" content=\"Temps de lectura:  3 minutsHi ha una nova mania a la ind\u00fastria de la IA: posar marques d\u2019aigua digitals a tot el que es genera. 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