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How to check a certificate's thumbprint

Solution ID : SO9840
Last Modified : 11/23/2023

A certificate's fingerprint is the unique identifier of the certificate. Microsoft Internet Explorer calls it Thumbprint. Although not part of the certificate but rather computed from it, browsers tend to display it as if it were.

A fingerprint is the MD5 digest of the der-encoded Certificate Info, which is an ASN.1 type specified as part of the X.509 specification.

The Certificate Fingerprint is a digest (hash function) of a certificate in x509 binary format. It can be calculated by different algorithms, such as SHA1 for Microsoft Internet Explorer.

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To check the fingerprint/thumbprint of a certificate, perform the following steps:

  1. Open Internet Explorer
  2. Go to Tools > Internet Options
  3. Click Content tab > Certificates
  4. In the Certificates window, click on the tab for the certificate you want to examine (Personal, Other People, Intermediate Certification Authorities, Trusted Root Certification Authorities)
  5. Locate the certificate or root in the list
  6. Double click on the entry
  7. Click the Details tab
  8. Scroll to Thumbprint
  9. The Thumbprint details will be displayed

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