What Are Distinguished Names


What are distinguished names on certificates? I see "CN=..." on in many certificates.

✍: FYIcenter.com


Distinguished Names are used in X.509 certificates to identify entities, such as those used in the subject and issuer (signer) fields.

The X.509 standard defines the following fields for Distinguished Names:

  • CN - Common Name of a person, e.g., "Susan Jones"
  • OU - Organization Unit (e.g., department or division) name, e.g., "Purchasing"
  • O - Organization name, e.g., "ABCSystems, Inc."
  • L - Locality (e.g., city) name, e.g., "Palo Alto"
  • ST - State or province name, e.g., "California"
  • C - Country ISO2 code, e.g., "US"

For example, below are Distinguished Names of a certificate:

 Issuer: C=ZA, ST=Western Cape, L=Cape Town, O=Thawte Consulting cc,
               OU=Certification Services Division,
               CN=Thawte Server CA/emailAddress=server-certs@thawte.com


What Are Certificate File Name Extensions

Example of X.509 Certificate Data Structure

Terminologies on Basic Concepts

⇑⇑ "What Is" - Certificate Related Terminologies

2012-07-25, 4848🔥, 0💬