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The guidelines are produced by the CA/Browser Forum, a voluntary organization whose members include leading CAs and vendors of Internet software, as well as representatives from the legal and audit professions.On June 12, 2007, the CA/Browser Forum officially ratified the first version of the Extended Validation (EV) SSL Guidelines, which took effect immediately.EV certificates are validated against both the Baseline Requirements and the Extended Validation requirements, which place additional requirements on how authorities vet companies.These include manual checks of all the domain names requested by the applicant, checks against official government sources, checks against independent information sources, and phone calls to the company to confirm the position of the applicant.Most browsers' user interfaces did not clearly differentiate between low-validation certificates and those that have undergone more rigorous vetting.Since any successful SSL/TLS connection will cause a green padlock icon to appear in most browsers, users are not likely to be aware of whether the website owner has been validated or not.Domain validated certificates existed before validation standards, and generally only require some proof of domain control.In particular, domain validated certificates do not assert that a given legal entity has any relationship with the domain, although the domain may resemble a particular legal entity.
In 2006, researchers at Stanford University and Microsoft Research conducted a usability study of the EV display in Internet Explorer 7.However, the requirement for a timely response to revocation checks by the browser has prompted most certificate authorities that had not previously done so to implement OCSP support.Section 26-A of the issuing criteria requires CAs to support OCSP checking for all certificates issued after Dec. Since EV certificates are being promoted and reported focused on that issue.An important motivation for using digital certificates with SSL/TLS was to add trust to online transactions by requiring website operators to undergo vetting with a certificate authority (CA) in order to get a certificate.
However, commercial pressures have led some CAs to introduce "domain validated" certificates.Each issuer uses a different object identifier (OID) in this field to identify their EV certificates, and each OID is documented in the issuer's Certification Practice Statement.