{"id":177,"date":"2014-11-06T05:46:51","date_gmt":"2014-11-06T13:46:51","guid":{"rendered":"https:\/\/www.ssls.com\/blog\/?p=177"},"modified":"2023-09-27T15:18:25","modified_gmt":"2023-09-27T22:18:25","slug":"sunsetting-sha-1-moving-sha-2","status":"publish","type":"post","link":"https:\/\/www.ssls.com\/blog\/sunsetting-sha-1-moving-sha-2\/","title":{"rendered":"Sunsetting SHA-1 and Moving to&nbsp;SHA-2"},"content":{"rendered":"<pre>One of the most important parts of SSL certificates\u2019 security is the signature algorithm. The SHA-1 cryptographic algorithm, created nearly 20 years ago, is one of the most commonly used hash function for websites that are protected with SSL.<\/pre>\n<p>SHA-1 is getting weaker every day and is frequently exposed to collision attacks in which hackers may obtain fraudulent certificates. However, SHA-1 is still widely used for many websites that are <a href=\"https:\/\/www.ssls.com\/blog\/us-and-more-governments-push-for-backdoor-encryption-access\/\">protected<\/a> with SSL.<\/p>\n<p><!--more--><\/p>\n<p>Google and Microsoft encourage Certification Authorities and website administrators to upgrade their <a href=\"https:\/\/www.ssls.com\/blog\/what-is-a-digital-certificate\/\">SSL certificates<\/a> to use signature algorithms with hash functions that are stronger than 160-bit SHA-1 \u2013 such as SHA-2, which can produce up to 512-bit hash value and is supported almost everywhere.<\/p>\n<p>According to a recent <a href=\"http:\/\/googleonlinesecurity.blogspot.com\/2014\/09\/gradually-sunsetting-sha-1.html\">Google announcement<\/a>, beginning November, users who visit websites that use SHA-1-based SSLs expiring any time in 2017 in updated Chrome 40 will see a warning that Google has recently announced that they\u2019re sunsetting SHA-1. Initially, the warnings will be limited to a \u201c<a href=\"https:\/\/www.ssls.com\/blog\/us-and-more-governments-push-for-backdoor-encryption-access\/\">Secure<\/a>, but minor errors\u201d icon, in the form of a lock with a yellow triangle. In later Chrome versions, this will become a red crossed-out lock.<\/p>\n<p>According to <a href=\"http:\/\/www.w3schools.com\/browsers\/browsers_stats.asp\">web browser statistics<\/a> collected from W3Schools&#8217; log-files, Google Chrome is the most-used web browser. In September 2014, Google Chrome usage was at 60%, Mozilla Firefox 24%, and\u00a0Microsoft Internet Explorer 10%.<a href=\"https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chart_05.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-195\" src=\"https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chart_05.jpg\" alt=\"chart_05\" width=\"699\" height=\"483\" srcset=\"https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chart_05.jpg 699w, https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chart_05-300x207.jpg 300w\" sizes=\"auto, (max-width: 699px) 100vw, 699px\" \/><\/a>Here is a <a href=\"http:\/\/www.symantec.com\/connect\/blogs\/google-s-sha-1-deprecation-plan-chrome\">matrix<\/a> showing important dates of changes in Chrome.<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-186\" src=\"https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chrome_versions_dates.jpg\" alt=\"chrome-versions-dates\" width=\"680\" height=\"300\" srcset=\"https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chrome_versions_dates.jpg 680w, https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chrome_versions_dates-300x132.jpg 300w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/p>\n<p><a href=\"https:\/\/blog.mozilla.org\/security\/2014\/09\/23\/phasing-out-certificates-with-sha-1-based-signature-algorithms\/\"><br \/>\nMozilla\u2019s CA Certificate Maintenance Policy<\/a> also agrees that SHA-1 certificates should not be issued after January 1, 2016 or trusted after January 1, 2017.<\/p>\n<h2>What You Should Do:<\/h2>\n<ul>\n<li>You may use this quick\u00a0<a href=\"https:\/\/shaaaaaaaaaaaaa.com\/\">checker<\/a>\u00a0or this detailed\u00a0<a href=\"https:\/\/www.ssllabs.com\/ssltest\/index.html\">SSL Server Test<\/a>\u00a0to check if your SSL certificate is using SHA-1 signature algorithm.<\/li>\n<li>Determine whether your server supports SHA-2.\u00a0If your server supports SHA-2 and your SHA-1-signed SSL expires before January 1, 2016, reissue your certificate.<\/li>\n<li>If you need more information, please contact your CA or certificate shop. If you have a certificate with SSLs.com &#8211; you can <a href=\"https:\/\/www.ssls.com\/knowledgebase-article.html?article_id=9416&amp;category_id=57\">reach out to us\u00a0here<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>One of the most important parts of SSL certificates\u2019 security is the signature algorithm. The SHA-1 cryptographic algorithm, created nearly 20 years ago, is one of the most commonly used hash function for websites that are protected with SSL. SHA-1 is getting weaker every day and is frequently exposed to collision attacks in which hackers [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[24],"class_list":["post-177","post","type-post","status-publish","format-standard","hentry","category-news","tag-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sunsetting SHA-1 and Moving to SHA-2 | SSLs.com Blog<\/title>\n<meta name=\"description\" content=\"One of the most important parts of SSL certificates\u2019 security is the signature algorithm. The SHA-1 cryptographic algorithm, created nearly 20 years ago,\" \/>\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.ssls.com\/blog\/sunsetting-sha-1-moving-sha-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sunsetting SHA-1 and Moving to SHA-2 | SSLs.com Blog\" \/>\n<meta property=\"og:description\" content=\"One of the most important parts of SSL certificates\u2019 security is the signature algorithm. The SHA-1 cryptographic algorithm, created nearly 20 years ago,\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ssls.com\/blog\/sunsetting-sha-1-moving-sha-2\/\" \/>\n<meta property=\"og:site_name\" content=\"SSLs.com Blog\" \/>\n<meta property=\"article:published_time\" content=\"2014-11-06T13:46:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-27T22:18:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ssls.com\/blog\/wp-content\/uploads\/2014\/11\/chart_05.jpg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/#\\\/schema\\\/person\\\/6afd6fb557ef48e6af8ad8b8bd5a6160\"},\"headline\":\"Sunsetting SHA-1 and Moving to&nbsp;SHA-2\",\"datePublished\":\"2014-11-06T13:46:51+00:00\",\"dateModified\":\"2023-09-27T22:18:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/\"},\"wordCount\":294,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ssls-blog.production.cloudplatform.tech\\\/wp-content\\\/uploads\\\/2014\\\/11\\\/chart_05.jpg\",\"keywords\":[\"Security\"],\"articleSection\":[\"news\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/\",\"url\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/\",\"name\":\"Sunsetting SHA-1 and Moving to SHA-2 | SSLs.com Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/sunsetting-sha-1-moving-sha-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ssls-blog.production.cloudplatform.tech\\\/wp-content\\\/uploads\\\/2014\\\/11\\\/chart_05.jpg\",\"datePublished\":\"2014-11-06T13:46:51+00:00\",\"dateModified\":\"2023-09-27T22:18:25+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.ssls.com\\\/blog\\\/#\\\/schema\\\/person\\\/6afd6fb557ef48e6af8ad8b8bd5a6160\"},\"description\":\"One of the most important parts of SSL certificates\u2019 security is the signature algorithm. 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