{"id":75534,"date":"2017-08-08T06:00:39","date_gmt":"2017-08-08T13:00:39","guid":{"rendered":"https:\/\/cloudblogs.microsoft.com\/microsoftsecure\/?p=75534"},"modified":"2023-05-15T23:06:17","modified_gmt":"2023-05-16T06:06:17","slug":"microsoft-to-remove-wosign-and-startcom-certificates-in-windows-10","status":"publish","type":"post","link":"https:\/\/www.microsoft.com\/en-us\/security\/blog\/2017\/08\/08\/microsoft-to-remove-wosign-and-startcom-certificates-in-windows-10\/","title":{"rendered":"Microsoft to remove WoSign and StartCom certificates in Windows 10"},"content":{"rendered":"

Microsoft has concluded that the Chinese Certificate Authorities (CAs) WoSign and StartCom have failed to maintain the standards required by our Trusted Root Program. Observed unacceptable security practices include back-dating SHA-1 certificates, mis-issuances of certificates, accidental certificate revocation, duplicate certificate serial numbers, and multiple CAB Forum Baseline Requirements (BR) violations.<\/p>\n

Thus, Microsoft will begin the natural deprecation of WoSign and StartCom certificates by setting a \u201cNotBefore\u201d date of 26 September 2017. This means all existing certificates will continue to function until they self-expire. Windows 10 will not trust any new certificates from these CAs after September 2017.<\/p>\n

Microsoft values the global Certificate Authority community and only makes these decisions after careful consideration as to what is best for the security of our users.<\/p>\n

\n

Talk to us<\/strong><\/h4>\n

Questions, concerns, or insights on this story? Join discussions at the Microsoft community<\/a> and Windows Defender Security Intelligence<\/a>.<\/p>\n

Follow us on Twitter @WDSecurity.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Microsoft has concluded that the Chinese Certificate Authorities (CAs) WoSign and StartCom have failed to maintain the standards required by our Trusted Root Program. Observed unacceptable security practices include back-dating SHA-1 certificates, mis-issuances of certificates, accidental certificate revocation, duplicate certificate serial numbers, and multiple CAB Forum Baseline Requirements (BR) violations. Thus, Microsoft will begin the […]<\/p>\n","protected":false},"author":61,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"_classifai_error":"","footnotes":""},"content-type":[3663],"topic":[3687],"products":[],"threat-intelligence":[3739],"tags":[],"coauthors":[1968],"class_list":["post-75534","post","type-post","status-publish","format-standard","hentry","content-type-research","topic-threat-intelligence","threat-intelligence-vulnerabilities-and-exploits"],"yoast_head":"\nMicrosoft to remove WoSign and StartCom certificates in Windows 10 | Microsoft Security Blog<\/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.microsoft.com\/en-us\/security\/blog\/2017\/08\/08\/microsoft-to-remove-wosign-and-startcom-certificates-in-windows-10\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Microsoft to remove WoSign and StartCom certificates in Windows 10 | Microsoft Security Blog\" \/>\n<meta property=\"og:description\" content=\"Microsoft has concluded that the Chinese Certificate Authorities (CAs) WoSign and StartCom have failed to maintain the standards required by our Trusted Root Program. 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