Distinguished Name (DN)

The Distinguished Name (DN) is the unique identifier of a subject in an X.509 certificate. It is composed of hierarchical attributes: CN (Common Name, name of the holder), O (Organization), OU (Organizational Unit), C (Country, country in ISO code), etc. — for example CN=Jean Dupont, O=Certyneo, C=FR. The DN of the signer is readable in the signature properties of a PDF validated in Adobe Acrobat Reader.