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The Certification Authority Browser Forum, also known as CA/Browser Forum, is a voluntary consortium of certification authorities, vendors of Internet browser software, operating systems, and other PKI-enabled applications that promulgates industry guidelines governing the issuance and management of X.509 v.3 digital certificates that chain to a trust anchor embedded in such applications. Its guidelines cover certificates used for the SSL/TLS protocol and code signing, as well as system and network security of certificate authorities.

CA/Browser Forum
CA Browser Forum Logo.jpg
FounderMelih Abdulhayoğlu
TypeProfessional Organization
FocusProvide internet security industry standards for browsers and Certificate Authorities

As of October 2014, the CA/Browser Forum includes over forty certificate authority members and the following six Internet browser software vendors: Microsoft (Microsoft Edge and Internet Explorer), Apple (Safari), Mozilla (Firefox), Google (Chrome), Opera, and Qihoo 360 (360 Secure Browser).[1]

The CA/Browser Forum maintains “Guidelines For The Issuance And Management Of Extended Validation (EV) Certificates”. The EV SSL standard improves security for Internet transactions and creates a more intuitive method of displaying secure sites to Internet users. In order for certificate authorities to issue EV SSL Certificates, they must be audited for compliance with the Forum's EV Guidelines[2] in accordance with either WebTrust or ETSI audit criteria.

The CA/Browser Forum adopted the "Baseline Requirements for the Issuance and Management of Publicly-Trusted Certificates" in 2011. These Guidelines, which are binding on members of the CA/Browser Forum, took effect July 1, 2012. These guidelines cover all CA-issued certificates. Certificates are now classified as "DV" (Domain Validated), "OV" (Organization Validated), "IV" (Individual Validated), and "EV" (Extended Validation), and a method is defined within the specification to distinguish the types of certificates.[3]


In 2005, Melih Abdulhayoglu of the Comodo Group organized[4] and arranged the first meeting of CA/Browser Forum. The first meeting was held in New York City. This was followed by a meeting in November 2005 in Kanata, Ontario, and a meeting in December, 2005, in Scottsdale, Arizona with the main objective to enable secure connections between users and websites.

In addition to CA/Browser Forum members, representatives of the Information Security Committee of the American Bar Association Section of Science & Technology, Law and the Canadian Institute of Chartered Accountants participated in developing the standards for issuing and managing Extended Validation SSL certificates.

Version 1.0 of the EV Guidelines was adopted on 7 June 2007.[5]

Version 1.1 was adopted by the CA/Browser Forum on 10 April 2008.[6]

Version 1.2 was adopted by the CA/Browser Forum on 1 Oct 2009.[7]

It is a great step forward in establishing verified identity for websites considers MSDN in its blog post.[8] Also, Microsoft's vision is that the backbone of an Internet identity system is composed of Extended Validation SSL Certificates intimately integrated with the users' browsing experience.[9]

The tougher certificates, coupled with browser developments,[10] could help fight phishing, which threatens the multibillion-dollar online retail market.

In November 2011, the CA/Browser Forum adopted version 1.0 of the "Baseline Requirements for the Issuance and Management of Publicly-Trusted Certificates."[3]

In February 2013 a new industry group, the Certificate Authority Security Council (CASC), was formed with a mission that includes promoting CA/Browser Forum standards. Membership requires adherence to CA/Browser Forum standards.[11] The CASC's founding members consist of the seven largest certificate authorities: Comodo,[12][13] Symantec,[14] Trend Micro, DigiCert, Entrust,[15] GlobalSign [16] and GoDaddy.[17][18][18][19][20][21]


  1. ^ "Members of the CA - Browser Forum - Over 30 CAs and All Major Browsers". CA/Browser Forum. Archived from the original on 2015-01-24. Retrieved 23 January 2015.
  2. ^ "CA/Browser Extended Validation Guidelines" (PDF). Archived from the original (PDF) on 2009-03-08.
  3. ^ a b "Baseline Requirements Documents". CA/Browser Forum. Retrieved 2014-10-26.
  4. ^ "How Can We Improve Code Signing?".
  7. ^ "Guidelines For The Issuance And Management Of Extended Validation Certificates". The CA/Browser Forum. Missing or empty |url= (help)
  8. ^ Extended Validation Guidelines v1 Released
  9. ^ Microsoft information on EV in IE7
  10. ^ CNet News - Browsers to get sturdier padlocks
  11. ^ "About the CA Security Council". 27 January 2013.
  12. ^ SSL Certificate Types, retrieved 2015-07-02
  13. ^ SSL Certificate, retrieved 2015-07-02
  14. ^ "Let's Build a More Secure Future".
  15. ^ "Entrust Joins World's Leading Certificate Authority".
  16. ^ "GlobalSign joins the Certificate Authority Security Council to upgrade internet security".
  17. ^ "Get more done with Microsoft Office 365 from GoDaddy".
  18. ^ a b "Authentication Security News, Analysis, Discussion, & Community". Archived from the original on 2013-04-10.
  19. ^ "Archived copy". Archived from the original on 2013-07-28. Retrieved 2013-04-02.
  20. ^ "Website Certificate Authorities Set Up Security Council for Advocacy, Research".
  21. ^ "Archived copy". Archived from the original on 2014-07-14. Retrieved 2013-04-02.

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