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You are viewing an outdated report. The latest version of this report was published on November 1st, 2015

Secure Server Survey
September 1st 2003

For analysis of other domains:

Report Description

The certificate authorities listed in this report are based on those where we can verify the full certificate chain up to the root certificate of the CA in question. For a number of reasons, the "Other" component in this report is rather large. These reasons include:

  1. In some cases CAs require you to agree to licensing terms before accessing their public keys. Any root public key not freely available is not included in this report, and the associated certificates signed by the key will be in the "Other" category.
  2. Some of the root public keys are inaccessible for other reasons, or may have simply not been included in our survey.
  3. This report limits itself to the top 7 verified root keys for reporting purposes (with the exception of self signed certificates, that are all grouped together in a single category).

An alternative view of the CA market can be seen in our newer CA Market Share report which does not rely on certificate chain validation, and reports on the top 100 CAs known.

Across All Domains

Certificate Authority1 Market Share Change (Total servers: 143,286 )
Authority2 August
Self Signed9,7696.82%9,1876.67%+0.15%
1Visit our alternative CA Market Share report for a view of CAs not covered here.
2Certificate Authorities are ordered according to their global market share.

September 1st 2003 CA Market Share Pie Chart

September 1st 2003 Historical Market Share Graph

Certificate Validity

Valid   61278
Self Signed   9769
Unknown Signer   27284
Cert-Host Mismatch   40343
Expired   9544

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