{"id":45758,"date":"2021-08-18T12:51:17","date_gmt":"2021-08-18T16:51:17","guid":{"rendered":"http:\/\/pappp.net\/?guid=6df8045a868a2fc83e417b42b7e40bf9"},"modified":"2021-08-18T12:51:17","modified_gmt":"2021-08-18T16:51:17","slug":"apples-neuralhash-algorithm-has-been-reverse-engineered","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=45758","title":{"rendered":"Apple\u2019s NeuralHash Algorithm Has Been Reverse-Engineered"},"content":{"rendered":"<p class=\"syndicated-attribution\">Source: <a href=\"https:\/\/www.schneier.com\/blog\/archives\/2021\/08\/apples-neuralhash-algorithm-has-been-reverse-engineered.html\">Schneier on Security<\/a><\/p>\n<div style=\"background-color : #fff7d5;\n\t\t\tborder-width : 1px; padding : 5px; border-style : dashed; border-color : #e7d796;margin-bottom : 1em; color : #9a8c59;\">Article note: That was quick.  Inevitable, but quick.<\/div><p>Apple&rsquo;s <a href=\"https:\/\/www.apple.com\/child-safety\/pdf\/CSAM_Detection_Technical_Summary.pdf\" rel=\"noopener noreferrer\">NeuralHash algorithm<\/a> &mdash; the one it&rsquo;s using for <a href=\"https:\/\/www.schneier.com\/blog\/archives\/2021\/08\/apple-adds-a-backdoor-to-imesssage-and-icloud-storage.html\" rel=\"noopener noreferrer\">client-side scanning<\/a> on the iPhone &mdash; has been <a href=\"https:\/\/github.com\/AsuharietYgvar\/AppleNeuralHash2ONNX\" rel=\"noopener noreferrer\">reverse-engineered<\/a>.<\/p>\n<p>Turns out it was already in iOS 14.3, and <a href=\"https:\/\/www.reddit.com\/r\/MachineLearning\/comments\/p6hsoh\/p_appleneuralhash2onnx_reverseengineered_apple\/\" rel=\"noopener noreferrer\">someone noticed<\/a>:<\/p>\n<blockquote><p>Early tests show that it can tolerate image resizing and compression, but not cropping or rotations.<\/p><\/blockquote>\n<p>We also have the <a href=\"https:\/\/github.com\/AsuharietYgvar\/AppleNeuralHash2ONNX\/issues\/1\" rel=\"noopener noreferrer\">first collision<\/a>: two images that hash to the same value.<\/p>\n<p>The next step is to generate innocuous images that NeuralHash classifies as prohibited content.<\/p>\n<p>This was a bad idea from the start, and Apple never seemed to consider the adversarial context of the system as a whole, and not just the cryptography.<\/p>","protected":false},"excerpt":{"rendered":"<p>Apple\u2019s NeuralHash algorithm \u2014 the one it\u2019s using for client-side scanning o&#8230;<\/p>\n<p> <a href=\"https:\/\/pappp.net\/?p=45758\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-45758","post","type-post","status-publish","format-standard","hentry","category-news-2"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/45758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=45758"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/45758\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=45758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=45758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=45758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}