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You are viewing an outdated report. The latest version of this report was published on January 1st, 2023

Certificate Authority Market Share Report
October 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 September 2002
September 2002
August 2002
August 2002
Equifax Secure Inc7,2797.547,5037.94-5.07
Equifax (Geotrust)4,7984.974,0274.2616.59
Snake Oil, Ltd1,7871.851,7901.89-2.31
U.S. Government7210.757020.740.50
Plesk Inc.5260.544650.4910.69
Comodo Limited2220.231250.1373.79
TC TrustCenter for Security in Data Networks GmbH1720.181550.168.59
The USERTRUST Network1440.151280.1410.09
Internet Widgits Pty Ltd1230.131080.1111.44
GlobalSign nv-sa1180.121110.124.03
Thawte Certification1000.101060.11-7.68
Advanced Extranet Server840.09740.0811.08
GTE Corporation830.09850.09-4.45
Deutsche Telekom AG830.09770.085.48
Kubota Systems Inc.810.08790.080.33
Esat Net560.06590.06-7.12
Ensim Corporation410.04440.05-8.82
CyberTrust Japan, Inc.380.04370.040.50
Ring d.o.o.360.04360.04-2.15
NeoNova B.V.350.04360.04-4.86
University of Florida320.03310.031.01
Franke & Partner300.03300.03-2.15
Onyx Internet280.03280.03-2.15
TAIWAN-CA.COM Inc.270.03270.03-2.15
Advantagecom Networks, Inc.250.03250.03-2.15
Web Hosting230.02230.02-2.15
Webmin Software210.02200.022.75
UUNET UK210.02210.02-2.15
Indra's Net, Inc.210.02210.02-2.15
Idonex AB210.02200.022.75
DeZines Web Hosting210.02210.02-2.15
WebMoney Transfer200.02180.028.73
Stargate.Net, Inc.200.02200.02-2.15
Deep Industry200.02190.023.00
Stalker Software, Inc.190.02190.02-2.15
PKI Partner AB190.02140.0132.80
Logacont AG190.02190.02-2.15
Massachusetts Institute of Technology180.02190.02-7.30
Your Organization170.02140.0118.82
University of Maryland170.02190.02-12.45
NetLock Halozatbiztonsagi Kft.170.02160.023.97
HAL interactive, d.o.o.170.02170.02-2.15
University of Helsinki160.02170.02-7.90
Linux Test Server160.02170.02-7.90
IPS Seguridad CA160.02140.0111.83
zNET Internet Services150.02370.04-60.33
Unizeto Sp. z o.o.140.01150.02-8.67
Tele Danmark140.01130.015.38
PVT a.s.130.01100.0127.21
XAO Inc.120.01120.01-2.15
Superb Internet Corp.120.01120.01-2.15
Sun Microsystems Inc120.01120.01-2.15
IceWarp Software120.0190.0130.47
IPrimus USA120.01120.01-2.15
Estore Corp120.01120.01-2.15
DeZines Web Hosting Corporation120.01120.01-2.15
Technische Universitaet Chemnitz110.01110.01-2.15
Nebraska On-Ramp110.01100.017.64
International Business Machines Corporation110.01110.01-2.15
Telepathy, Inc100.01110.01-11.04
Kasetsart University100.0190.018.73
KPNQwest International100.0190.018.73
Uppsala universitet90.0180.0110.09
University of Wisconsin - Stevens Point (UWSP)90.0100.00N/A
Tampere University of Technology90.0190.01-2.15
Schell Computersysteme90.0190.01-2.15
Inter Clear Service Ltd90.01100.01-11.93
Carnegie Mellon University90.01100.01-11.93
Associazione Investici90.0190.01-2.15
A&S Systemtechnik90.0190.01-2.15
WebNexus Communications80.0180.01-2.15
Viawest Internet Services80.0180.01-2.15
University of Waterloo80.0180.01-2.15
Universitaet Heidelberg80.0180.01-2.15
Swiss-Web GmbH80.0100.00N/A
ServeLinux Networks, Inc.80.0100.00N/A
SYLABA Internet80.0180.01-2.15
Rutgers University80.0180.01-2.15 srl80.0100.00N/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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