{"id":3933,"date":"2023-08-07T17:58:34","date_gmt":"2023-08-07T17:58:34","guid":{"rendered":"https:\/\/dailyai.com\/?p=3933"},"modified":"2023-08-07T18:08:41","modified_gmt":"2023-08-07T18:08:41","slug":"ai-powered-acoustic-attack-extracts-data-from-keystrokes-with-95-precision","status":"publish","type":"post","link":"https:\/\/dailyai.com\/nl\/2023\/08\/ai-powered-acoustic-attack-extracts-data-from-keystrokes-with-95-precision\/","title":{"rendered":"AI-gestuurde akoestische aanval haalt gegevens uit toetsaanslagen met 95% precisie"},"content":{"rendered":"<p><b>Onderzoekers van de Britse universiteiten Durham University, University of Surrey en Royal Holloway University of London ontwikkelden een innovatieve AI-ondersteunde techniek voor het extraheren van toetsaanslagen uit akoestische opnames.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">De <\/span><a href=\"https:\/\/arxiv.org\/pdf\/2308.01074.pdf\"><span style=\"font-weight: 400;\">onderzoek<\/span><\/a><span style=\"font-weight: 400;\"> een techniek ontwikkeld om met succes toetsaanslagen van toetsenborden te lezen met behulp van geluidsopnames. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Met deze techniek kunnen hackers toetsaanslagen analyseren door de microfoon van een apparaat over te nemen en persoonlijke informatie zoals wachtwoorden, priv\u00e9gesprekken, berichten en andere gevoelige gegevens te verzamelen.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Toetsaanslagen worden opgenomen via een microfoon en verwerkt en geanalyseerd door een machine learning (ML) model dat hun afstand en positie op het toetsenbord bepaalt.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Het model kan individuele toetsaanslagen identificeren met een schokkende nauwkeurigheid van 95% wanneer de aanslagen zijn opgenomen via een microfoon van een telefoon in de buurt. De voorspellingsnauwkeurigheid daalde tot 93% wanneer opnames gemaakt via Zoom werden gebruikt om het geluidsclassificatiealgoritme te trainen.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Akoestische hackaanvallen zijn steeds geavanceerder geworden door de wijdverspreide beschikbaarheid van apparaten uitgerust met microfoons die audio van hoge kwaliteit kunnen opnemen.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Hoe werkt het model?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">De aanval begint met het opnemen van toetsaanslagen op het toetsenbord van het doelwit. Deze gegevens zijn cruciaal voor het trainen van het voorspellende algoritme.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Deze opname kan worden gemaakt met behulp van een microfoon in de buurt of de met malware ge\u00efnfecteerde telefoon van het doelwit met toegang tot de microfoon.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Als alternatief kan een malafide deelnemer aan een Zoom-gesprek berichten die door het doelwit zijn getypt correleren met hun geluidsopname. Er kunnen ook manieren zijn om de microfoon van de computer te hacken met behulp van malware of zwakke plekken in de software.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">De onderzoekers verzamelden trainingsgegevens door 25 keer op elk van de 36 toetsen van een moderne MacBook Pro te drukken en het geluid op te nemen dat elke toetsaanslag voortbracht. Van deze opnames werden golfvormen en spectrogrammen gemaakt, die identificeerbare variaties voor elke toets visualiseerden.\u00a0<\/span><\/p>\n<figure id=\"attachment_3934\" aria-describedby=\"caption-attachment-3934\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3934 size-large\" src=\"https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-1024x342.png\" alt=\"AI toetsaanslagen\" width=\"1024\" height=\"342\" srcset=\"https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-1024x342.png 1024w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-300x100.png 300w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-768x256.png 768w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-1536x513.png 1536w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-370x123.png 370w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-800x267.png 800w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-740x247.png 740w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-20x7.png 20w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-1600x534.png 1600w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram-144x48.png 144w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/08\/spectrogram.png 1636w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-3934\" class=\"wp-caption-text\">Onderzoekers verwerkten audio-opnames tot spectrogrammen die werden verwerkt door een machine learning (ML) model. Bron: <a href=\"https:\/\/arxiv.org\/pdf\/2308.01074.pdf\">Een praktische, op Deep Learning gebaseerde aanval op akoestische zijkanalen op toetsenborden<\/a>.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Verdere gegevensverwerking werd uitgevoerd om de signalen te verbeteren die werden gebruikt om toetsaanslagen te identificeren.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Deze spectrogrammen werden gebruikt om 'CoAtNet' te trainen, een beeldclassificator die verschillende audiospectrogrammen toeschrijft aan verschillende toetsaanslagen.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In hun tests gebruikten de onderzoekers een laptop met een toetsenbord dat vergelijkbaar is met de nieuwere laptops van Apple. Microfoons en opnamemethoden waren onder andere een iPhone 13 Mini op 17 cm afstand van het doel, Zoom en Skype.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">De CoANet classificator toonde 95% nauwkeurigheid van smartphone opnames en 93% van opnames gemaakt via Zoom. Ze testten ook toetsaanslagen opgenomen via Skype, wat 91.7% nauwkeurigheid opleverde.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Het onderzoeksartikel stelt voor om typstijlen te veranderen of gerandomiseerde wachtwoorden te gebruiken om dergelijke aanvallen te voorkomen, maar dat is verre van praktisch.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Andere mogelijke verdedigingsmaatregelen zijn het gebruik van software om toetsaanslaggeluiden te reproduceren, witte ruis of softwarematige audiofilters voor toetsaanslagen. <\/span><span style=\"font-weight: 400;\">Uit het onderzoek bleek echter dat zelfs een stil toetsenbord met succes kon worden geanalyseerd op toetsaanslagen.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dit is nog een nieuw voorbeeld van hoe machine learning <a href=\"https:\/\/dailyai.com\/nl\/2023\/06\/ai-related-fraud-could-cost-us-taxpayers-up-to-1-trillion-according-to-analyst\/\">geavanceerde fraudetechnieken<\/a>. A <a href=\"https:\/\/dailyai.com\/nl\/2023\/08\/ai-generated-deep-fake-voices-trick-over-1-4-of-participants-in-a-new-study\/\">recente studie<\/a> ontdekten dat diepe nepstemmen maar liefst 25% van de mensen voor de gek konden houden.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Audio-aanvallen kunnen gericht zijn op hooggeplaatste personen zoals politici en CEO's om gevoelige informatie te stelen of ransomware-aanvallen te lanceren op basis van gestolen gesprekken.\u00a0<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Onderzoekers van de Britse universiteiten Durham University, University of Surrey en Royal Holloway University of London ontwikkelden een innovatieve AI-ondersteunde techniek voor het extraheren van toetsaanslagen uit akoestische opnames.  Het onderzoek ontwikkelde een techniek om met succes toetsaanslagen van toetsenborden te lezen met behulp van geluidsopnamen. Deze techniek zou hackers in staat kunnen stellen om toetsaanslagen te analyseren door de microfoon van een apparaat over te nemen en persoonlijke informatie zoals wachtwoorden, priv\u00e9gesprekken, berichten en andere gevoelige gegevens te verzamelen.  Toetsaanslagen worden opgenomen via een microfoon en verwerkt en geanalyseerd door een machine learning (ML) model dat hun afstand en positie op het toetsenbord bepaalt.  Het model kan individuele toetsaanslagen identificeren met<\/p>","protected":false},"author":2,"featured_media":3935,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[161,283,105],"class_list":["post-3933","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-fraud","tag-hackers","tag-machine-learning"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AI-powered acoustic attack extracts data from keystrokes with 95% precision | DailyAI<\/title>\n<meta name=\"description\" content=\"Researchers from UK universities Durham University, University of Surrey, and Royal Holloway University of London developed an innovative AI-supported technique for extracting keystrokes from acoustic recordings.\u00a0\" \/>\n<meta name=\"robots\" content=\"index, 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