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The primary way to identify an EV certificate is by referencing the Certificate Policies extension field. 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.

EV stands for extended validation. This means that the certificate authority has completed an extended validation process, where they check and verify your company details, phone number, etc. It's a higher bar, and higher assurance than a standard SSL certificate.

The DV cert provides only the padlock sign in the address bar and no other CA-validated information. Upon clicking the padlock sign, one can see the connection is a secure message with both certs and the Certificate (Valid) option. A dialog box opens on clicking the Certificate (Valid) option with an OV cert.

The subject of the certificate is the entity its public key is associated with (i.e. the "owner" of the certificate). As RFC 5280 says: The subject field identifies the entity associated with the public key stored in the subject public key field.

It consists of a number of attribute-value pairs called Relative Distinguished Names (RDNs). Some of the most common RDNs and their explanations are as follows: CN : CommonName. OU : OrganizationalUnit.

Required fields should be indicated with either a symbol or text, not just color. When providing an indicator for a required field, it should be placed right before the form field. This allows a screen reader to read the indicator to a screen reader user right before the user activates the field.

Verify that a web site you are visiting is who it claims to be. If you see green in the address bar in your browser, the web site has an Extended Validation (EV) Cert and it's encrypted.

An EV certificate is the highest level of SSL certificates. All SSL certificates ? Extended Validation (EV), Organization Validated (OV), and Domain Validated (DV) ? provides encryption and data integrity. However, they vary in how strict the process is to verify the identity of the website owner.