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You are viewing an outdated report. The latest version of this report was published on April 1st, 2025


    
Certificate Authority Market Share Report
October 1st, 2003

Report Description
This report, much like our original certs and CAs report, focuses on issuers of SSL enabling certificates found on web servers. Unlike our original report, however, this report has a couple of key differences to it:

  • Reports on top 100 CAs. The original report only paid attention to the major CAs at the time the report was produced. This report lists the top 100 CAs for the month. You will find here many self-signing organizations such as universities, telecommunications firms, etc.
  • Uses issuer name as identifier. Our original report only counted a certificate towards an organization if we were able to prove, by virtue of verifying the key, that the organization in question actually signed the certificate. This had a notable problem with it - we don't always have the public key of the CA. In at least one case, a CA doesn't make their public key available unless you sign a license agreement.

    This report doesn't have that problem, since it only uses the issuer Organization Name to uniquely identify the issuing CA.

CA September 2003
Count
September 2003
%
August 2003
Count
August 2003
%
Growth
%
Verisign64,98942.4762,49442.52-0.13
Thawte33,27521.7433,14522.55-3.58
Equifax (Geotrust)20,26213.2419,18613.051.43
Comodo Limited6,6664.365,7883.9410.61
Snake Oil, Ltd2,1781.422,1441.46-2.44
SomeOrganization1,9811.291,8471.263.01
Entrust.net1,7991.181,7081.161.16
U.S. Government1,1000.721,0600.72-0.34
The USERTRUST Network6130.405910.40-0.39
IPS Certification Authority s.l.5380.355120.350.92
Plesk, Inc.5360.355040.342.14
Unknown4740.313630.2525.41
Plesk Inc.4620.304650.32-4.58
FreeSSL4140.273240.2222.72
TC TrustCenter for Security in Data Networks GmbH3360.223140.212.77
GlobalSign nv-sa2710.182490.174.52
Equifax Secure Inc2280.152520.17-13.11
Ipswitch,Inc.1930.131930.13-3.96
GTE Corporation1840.121800.12-1.83
Deutsche Telekom AG1520.101470.10-0.69
Thawte Certification1410.091370.09-1.16
ispgateway1130.071080.070.49
Kubota Systems Inc.1000.071020.07-5.84
Advanced Extranet Server840.05780.053.43
Internet Widgits Pty Ltd720.05770.05-10.20
Baltimore Technologies Japan Co.,Ltd.630.04480.0326.05
Digital Signature Trust Co.620.04590.040.92
PKI Partner AB550.04540.04-2.18
NetLock Halozatbiztonsagi Kft.550.04490.037.80
CETI500.03530.04-9.40
SOGO KEIBI HOSHO CO.LTD480.03520.04-11.35
TAIWAN-CA.COM Inc.440.03440.03-3.96
Positive Software400.03350.029.76
Beocity400.03400.03-3.96
community musician390.03390.03-3.96
XYZ Corporation390.03390.03-3.96
Webmin Software390.03340.0210.16
Ensim Corporation390.03400.03-6.36
IceWarp Software380.02320.0214.05
CyberTrust Japan, Inc.380.02440.03-17.06
University of Florida370.02370.03-3.96
Tele Danmark360.02350.02-1.22
Deutsches Forschungsnetz360.02380.03-9.02
WebMoney Transfer350.02340.02-1.14
Unizeto Sp. z o.o.350.02380.03-11.54
SCNC350.02320.025.04
NeoNova B.V.350.02340.02-1.14
KICA290.02270.023.15
Franke & Partner290.02290.02-3.96
Your Organization270.02250.023.72
Stalker Software, Inc.270.02250.023.72
SWsoft, Inc.270.0200.00N/A
Massachusetts Institute of Technology260.02220.0113.50
HJ.NET250.02250.02-3.96
University of Maryland240.02230.020.22
Onyx Internet240.02240.02-3.96
OCC230.02220.010.40
ICS_TREE230.02180.0122.72
CNRS230.02210.015.19
cv. Candi Internet220.01200.015.64
Temp Certificate!220.01200.015.64
Advantagecom Networks, Inc.220.01230.02-8.14
Sun Microsystems Inc210.01200.010.84
Root CA210.01150.0134.46
PVT a.s.210.01160.0126.05
KMD210.01210.01-3.96
Apache HTTP Server210.01180.0112.05
ROOT200.01200.01-3.96
FAS200.0100.00N/A
media3190.01190.01-3.96
Stargate.Net, Inc.190.01190.01-3.96
University of Waterloo180.01160.018.04
University of Helsinki180.01180.01-3.96
DeZines Web Hosting180.01180.01-3.96
CsideNet180.01180.01-3.96
BSG180.01150.0115.25
Webmin Webserver170.0100.00N/A
Technische Universitaet Chemnitz170.01170.01-3.96
ICP-Brasil170.01180.01-9.30
HAL interactive, d.o.o.170.01170.01-3.96
Carnegie Mellon University170.01150.018.84
Web Hosting160.01160.01-3.96
Logacont AG160.01160.01-3.96
INFN160.01150.012.44
FNMT160.01150.012.44
Aaex Corp.160.01150.012.44
kundenserver.de150.01130.0110.81
Usermin Webserver150.0100.00N/A
UUNET UK150.01150.01-3.96
UNESP150.01150.01-3.96
Sedo GmbH150.0100.00N/A
Register4less150.01150.01-3.96
Akamai150.01140.012.90
1&1 Internet Limited150.0100.00N/A
The Chinese University of Hong Kong140.01140.01-3.96
Postecom s.p.a.140.01140.01-3.96
NIH140.01170.01-20.91
My Company Ltd140.01150.01-10.36
University of Wisconsin - Stevens Point (UWSP)130.01130.01-3.96
Universitaet Karlsruhe130.01130.01-3.96

Note: Readers are cautioned that the Growth percentages are based on a CA's market share penetration rather than the absolute number of certificates we detected. Thus, it is possible for the number of certificates to increase, while the growth is actually a negative value.



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