{"id":114553,"date":"2026-02-14T00:11:34","date_gmt":"2026-02-14T00:11:34","guid":{"rendered":"https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/?p=114553"},"modified":"2026-02-14T08:06:45","modified_gmt":"2026-02-14T08:06:45","slug":"exclusive-filigrane-llm-vulnerabili-nuove-falle-nella-sicurezza-dei-testi-ai","status":"publish","type":"post","link":"https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/exclusive-filigrane-llm-vulnerabili-nuove-falle-nella-sicurezza-dei-testi-ai\/","title":{"rendered":"TOPstory &#8211;\u00a0Filigrane LLM vulnerabili: nuove falle nella sicurezza dei testi AI"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Uno <a href=\"https:\/\/arxiv.org\/pdf\/2602.04796\" target=\"_blank\" rel=\"noreferrer noopener\">studio presentato al Simposio NDSS 2026<\/a> dimostra che le filigrane dei Large Language Model, ritenute uno strumento chiave contro l\u2019uso improprio dei contenuti generati dall\u2019IA, possono essere rimosse efficacemente con semplici perturbazioni a livello di carattere, anche in scenari di attacco realistici e con risorse limitate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le filigrane per LLM sono progettate per inserire segnali statistici invisibili nei testi generati, cos\u00ec da renderli identificabili a posteriori. Tuttavia, una ricerca accademica presentata al&nbsp;<strong>Network and Distributed System Security Symposium2026<\/strong>&nbsp;mette in discussione la reale robustezza di questi sistemi. Secondo gli autori, le valutazioni precedenti avrebbero sovrastimato la sicurezza delle filigrane, basandosi su modelli di attacco poco realistici.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lo studio introduce due modelli di minaccia pratici: uno senza accesso al rilevatore di filigrana e uno con accesso black-box limitato. In entrambi i casi, emerge che le perturbazioni a livello di carattere \u2014 come refusi, cancellazioni, scambi di lettere o l\u2019uso di omoglifi \u2014 risultano molto pi\u00f9 efficaci delle tradizionali parafrasi o sostituzioni di token. Il motivo \u00e8 tecnico ma cruciale: queste micro-modifiche interrompono il processo di tokenizzazione, influenzando simultaneamente pi\u00f9 token e indebolendo il segnale della filigrana.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nel secondo scenario, i ricercatori propongono un attacco pi\u00f9 sofisticato basato su algoritmi genetici, guidato da un \u201crilevatore di riferimento\u201d addestrato con poche query. I test condotti su cinque schemi di watermarking e due LLM ampiamente diffusi mostrano tassi di rimozione elevati anche con budget di perturbazione ridotti.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La conclusione \u00e8 netta: esiste un \u201cdilemma avversario\u201d per le difese. Qualsiasi contromisura statica pu\u00f2 essere aggirata da strategie di perturbazione adattive. Il lavoro evidenzia quindi una vulnerabilit\u00e0 strutturale nelle attuali filigrane LLM e rafforza l\u2019urgenza di sviluppare meccanismi di attribuzione pi\u00f9 robusti, dinamici e resistenti agli attacchi.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Approfondimento \u2013 Cronologia e contesto<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>2022\u20132024<\/strong>: prime proposte di watermarking per LLM come risposta a disinformazione e frodi accademiche.<br>Fonte: arXiv, OpenAI, universit\u00e0 USA ed europee.<\/li>\n\n\n\n<li><strong>2024\u20132025<\/strong>: adozione sperimentale di filigrane e rilevatori statistici nei modelli commerciali.<br>Fonte: policy paper di governi e Big Tech.<\/li>\n\n\n\n<li><strong>Febbraio 2026<\/strong>: presentazione dello studio al NDSS 2026, che dimostra l\u2019efficacia di attacchi a basso costo.<br>DOI ufficiale:\u00a0<a href=\"https:\/\/dx.doi.org\/10.14722\/ndss.2026.230138\">https:\/\/dx.doi.org\/10.14722\/ndss.2026.230138<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Consigli di approfondimento<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Atti ufficiali NDSS 2026:\u00a0<a href=\"https:\/\/www.ndss-symposium.org\/\">https:\/\/www.ndss-symposium.org<\/a><\/li>\n\n\n\n<li>Analisi accademiche su watermarking LLM (arXiv):\u00a0<a href=\"https:\/\/arxiv.org\/\">https:\/\/arxiv.org<\/a><\/li>\n\n\n\n<li>Linee guida UE su tracciabilit\u00e0 dei contenuti AI:\u00a0https:\/\/digital-strategy.ec.europa.eu<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Abstract \u2013 Pro, rischi e implicazioni<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro<\/strong>: lo studio migliora la comprensione delle reali capacit\u00e0 degli attaccanti e smaschera false percezioni di sicurezza.<br><strong>Rischi<\/strong>: indebolimento degli strumenti di attribuzione, aumento di disinformazione e frodi difficili da tracciare.<br><strong>Implicazioni future<\/strong>: senza filigrane pi\u00f9 robuste e adattive, la fiducia sociale nei contenuti digitali potrebbe erodersi, accelerando la necessit\u00e0 di standard normativi e soluzioni tecniche multilivello.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai-1024x683.jpg\" alt=\"Filigrane LLM vulnerabili: nuove falle nella sicurezza dei testi AI\" class=\"wp-image-114577\" srcset=\"https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai-1024x683.jpg 1024w, https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai-300x200.jpg 300w, https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai-768x512.jpg 768w, https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai-696x464.jpg 696w, https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai-1068x712.jpg 1068w, https:\/\/www.aiopenmind.it\/ArtificialIntelligence\/wp-content\/uploads\/2026\/02\/filigrane-llm-vulnerabili-sicurezza-testi-ai.jpg 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Uno studio presentato al Simposio NDSS 2026 dimostra che le filigrane dei Large Language Model, ritenute uno strumento chiave contro l\u2019uso improprio dei contenuti generati dall\u2019IA, possono essere rimosse efficacemente con semplici perturbazioni a livello di carattere, anche in scenari di attacco realistici e con risorse limitate. Le filigrane per LLM sono progettate per inserire [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":114577,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"footnotes":""},"categories":[429,365,4],"tags":[215,63],"class_list":["post-114553","post","type-post","status-publish","format-standard","has-post-thumbnail","category-ricerca-scientifica-aiopenmind","category-newscybersecurityaiopenmind","category-in-evidenza-e-7giorninews","tag-cybersecurity","tag-report"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>TOPstory -\u00a0Filigrane LLM vulnerabili: nuove falle nella sicurezza dei testi AI &#8212; AIopenmind<\/title>\n<meta name=\"description\" content=\"Filigrane LLM vulnerabili: uno studio NDSS 2026 rivela come semplici perturbazioni possano rimuovere i 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