{"id":34530,"date":"2023-06-12T09:23:39","date_gmt":"2023-06-12T08:23:39","guid":{"rendered":"https:\/\/www.gt-engineering.it\/?post_type=normativa_tecnica&#038;p=34530"},"modified":"2023-08-11T09:17:59","modified_gmt":"2023-08-11T08:17:59","slug":"the-security-levels","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iec-standards\/iec-ts-63074-2023\/the-security-levels\/","title":{"rendered":"The Security Levels"},"content":{"rendered":"\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  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           height=\"1024\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/shutterstock_25760206-835x1024.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/shutterstock_25760206.jpg.webp\"\r\n                                                        title=\"shutterstock_25760206\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n                    <div class=\"relative w-full\">\n                \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>IEC 62443-3-3 defines a Security Level (SL) as:<\/p>\n<p>&nbsp;<\/p>\n<p>[ IEC 62443-3-3: 2013] <strong><em>3.1.38 security level.<\/em><\/strong><em> Measure of confidence that the IACS is free from vulnerabilities and functions in the intended manner <\/em><\/p>\n<p>&nbsp;<\/p>\n<p>The associated four SLs are defined as:<\/p>\n<ul>\n<li>SL 1 \u2013 Prevent the unauthorized disclosure of information via eavesdropping or casual exposure.<\/li>\n<li>SL 2 \u2013 Prevent the unauthorized disclosure of information to an entity actively searching for it using simple means with low resources, generic skills and low motivation.<\/li>\n<li>SL 3 \u2013 Prevent the unauthorized disclosure of information to an entity actively searching for it using sophisticated means with moderate resources, IACS specific skills and moderate motivation.<\/li>\n<li>SL 4 \u2013 Prevent the unauthorized disclosure of information to an entity actively searching for it using sophisticated means with extended resources, IACS specific skills and high motivation.<\/li>\n<\/ul>\n<p>These SL attributes demonstrate an essenstial connection to the Safety Integrity Level (SIL) concept introduced in the IEC 61511 functional safety standards, in that each subsequent security level represents an order of magnitude risk reduction. The specific requirements for achieving a determined SL or SIL are very different.<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>IEC 62443-3-3 defines a Security Level (SL) as:<\/p>\n","protected":false},"author":2,"featured_media":42011,"parent":34508,"menu_order":3,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[58],"class_list":["post-34530","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-en-iec-standards"],"acf":{"sottotitolo":"","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Security Levels - Gt-Engineering<\/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:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iec-standards\/iec-ts-63074-2023\/the-security-levels\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Security Levels - Gt-Engineering\" \/>\n<meta property=\"og:description\" content=\"IEC 62443-3-3 defines a Security Level (SL) as:\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iec-standards\/iec-ts-63074-2023\/the-security-levels\/\" \/>\n<meta property=\"og:site_name\" content=\"Gt-Engineering\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-11T08:17:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/shutterstock_25760206.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"2513\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/\",\"url\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/\",\"name\":\"The Security Levels - Gt-Engineering\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.gt-engineering.it\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/shutterstock_25760206.jpg\",\"datePublished\":\"2023-06-12T08:23:39+00:00\",\"dateModified\":\"2023-08-11T08:17:59+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.gt-engineering.it\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/shutterstock_25760206.jpg\",\"contentUrl\":\"https:\\\/\\\/www.gt-engineering.it\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/shutterstock_25760206.jpg\",\"width\":2048,\"height\":2513},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/iec-ts-63074-2023\\\/the-security-levels\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Technical standards\",\"item\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/normative-tecniche\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"EN IEC Standards\",\"item\":\"https:\\\/\\\/www.gt-engineering.it\\\/en\\\/technical-standards\\\/en-iec-standards\\\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"IEC TS 63074: 2023 &#8211; 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