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You are viewing an outdated report. The latest version of this report was published on January 1st, 2021

Certificate Authority Market Share Report
November 1st, 2002

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 October 2002
October 2002
September 2002
September 2002
Equifax Secure Inc6,6026.687,2797.54-11.36
Equifax (Geotrust)6,0516.124,7984.9723.25
Snake Oil, Ltd1,8121.831,7871.85-0.91
U.S. Government7700.787210.754.37
Plesk Inc.5520.565260.542.56
Comodo Limited3580.362220.2357.59
TC TrustCenter for Security in Data Networks GmbH1790.181720.181.70
The USERTRUST Network1520.151440.153.16
GlobalSign nv-sa1250.131180.123.52
Internet Widgits Pty Ltd1210.121230.13-3.86
GTE Corporation1160.12830.0936.58
Thawte Certification1050.111000.102.61
Deutsche Telekom AG900.09830.095.97
Kubota Systems Inc.810.08810.08-2.27
Advanced Extranet Server760.08840.09-11.58
Esat Net510.05560.06-11.00
CyberTrust Japan, Inc.420.04380.048.01
zNET Internet Services380.04150.02147.57
Ensim Corporation380.04410.04-9.42
NeoNova B.V.350.04350.04-2.27
Ring d.o.o.340.03360.04-7.70
University of Florida320.03320.03-2.27
TAIWAN-CA.COM Inc.320.03270.0315.82
Franke & Partner300.03300.03-2.27
PKI Partner AB280.03190.0244.02
Onyx Internet270.03280.03-5.76
Advantagecom Networks, Inc.270.03250.035.54
Webmin Software240.02210.0211.69
WebMoney Transfer210.02200.022.61
UUNET UK210.02210.02-2.27
Massachusetts Institute of Technology210.02180.0214.01
Indra's Net, Inc.210.02210.02-2.27
Idonex AB210.02210.02-2.27
DeZines Web Hosting210.02210.02-2.27
Your Organization200.02170.0214.97
Web Hosting200.02230.02-15.02
Stargate.Net, Inc.200.02200.02-2.27
Stalker Software, Inc.200.02190.022.87
Deep Industry200.02200.02-2.27
Tele Danmark180.02140.0125.65
Logacont AG180.02190.02-7.42
Unizeto Sp. z o.o.170.02140.0118.67
University of Maryland170.02170.02-2.27
NetLock Halozatbiztonsagi Kft.170.02170.02-2.27
HAL interactive, d.o.o.170.02170.02-2.27
University of Helsinki160.02160.02-2.27
Sofia Kallin160.0200.00N/A
Linux Test Server150.02160.02-8.38
IPS Seguridad CA150.02160.02-8.38
XAO Inc.140.01120.0114.01
Technische Universitaet Chemnitz140.01110.0124.38
Radio Data Group Inc140.0100.00N/A
PVT a.s.140.01130.015.24
Superb Internet Corp.130.01120.015.87
Sun Microsystems Inc130.01120.015.87
IPrimus USA130.01120.015.87
Plesk, Inc.120.0100.00N/A
International Business Machines Corporation120.01110.016.61
IceWarp Software120.01120.01-2.27
Estore Corp120.01120.01-2.27
DeZines Web Hosting Corporation120.01120.01-2.27
University of Wisconsin - Stevens Point (UWSP)110.0190.0119.44
Nebraska On-Ramp110.01110.01-2.27
Kasetsart University110.01100.017.50
KPNQwest International110.01100.017.50
Carnegie Mellon University110.0190.0119.44
Telepathy, Inc100.01100.01-2.27
Uppsala universitet90.0190.01-2.27
University of Waterloo90.0180.019.94
Tampere University of Technology90.0190.01-2.27
Schell Computersysteme90.0190.01-2.27
Inter Clear Service Ltd90.0190.01-2.27
Digicert Sdn Bhd90.0100.00N/A
BEA WebLogic90.0100.00N/A
Associazione Investici90.0190.01-2.27
A&S Systemtechnik90.0190.01-2.27
Viawest Internet Services80.0180.01-2.27
Universitaet Heidelberg80.0180.01-2.27
Temp Certificate!80.0100.00N/A
TU Dresden80.0100.00N/A

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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