An X509 certificate is nothing more than a digital certificate which follows the X509 standards. These standards are used by organizations of all different sizes to prevent problems with compatibility. Without standards, each business would be able to create their own digital certificates, using their desired format. However, when they went to share their certificates with other businesses, there would be compatibility problems across different applications.
Information in an X509 Certificate Will Be in the Same Location
The standardization found in an X509 certificate determines the types of information and the location where this information is contained. Each company will place their own unique identifying information in the same places. For example, you can find the business or individual, who issued the digital certificate in the same location for all digital certificates following the X509 standards. Learning the issuer of the digital certificate can be important, should there be problems with the certificate not working correctly.