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Certificate Authority Market Share Report
December 1st, 2005

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.

SomeOrganization CA Certificate Historical Market Share Graph

CA November 2005
Count
November 2005
%
October 2005
Count
October 2005
%
Growth
%
Verisign72,99831.2372,41331.88-2.03
Equifax (Geotrust)42,97318.3940,10717.664.13
Thawte36,93815.8036,39716.02-1.37
Comodo Limited20,2118.6520,2478.91-2.98
Starfield Technologies, Inc.4,8172.064,3861.936.74
Unknown3,7141.593,4591.524.35
Entrust.net3,6411.563,4821.531.63
SomeOrganization3,0381.303,0001.32-1.58
The USERTRUST Network2,4171.032,5661.13-8.46
Snake Oil, Ltd2,0560.882,0400.90-2.05
SWsoft, Inc.1,8300.781,7290.762.87
ChainedSSL1,6690.711,5190.676.79
U.S. Government1,3800.591,3990.62-4.13
XRamp Security Services Inc1,1740.501,1290.501.06
DigiCert Inc.9260.408330.378.04
AddTrust AB8680.372500.11237.44
TC TrustCenter for Security in Data Networks GmbH7320.317300.32-2.55
IPS Certification Authority s.l.7080.306820.300.89
GlobalSign nv-sa5660.245520.24-0.35
Network Solutions L.L.C.5260.233990.1828.12
Root CA4950.214620.204.13
FreeSSL4460.194720.21-8.17
Betrusted Japan Co.,Ltd.3260.143010.135.26
Plesk, Inc.3060.133110.14-4.37
Deutsche Telekom AG2870.122830.12-1.44
GTE Corporation2450.102510.11-5.14
ispgateway2250.102230.10-1.94
Ipswitch,Inc.1990.091960.09-1.32
TDC1500.061550.07-5.95
Kubota Systems Inc.1490.061500.07-3.46
Akamai1470.061280.0611.61
Apache HTTP Server1440.061420.06-1.44
Positive Software1400.061450.06-6.16
Plesk Inc.1330.061410.06-8.33
Comodo Japan Inc.1300.061160.058.92
Internet Widgits Pty Ltd1200.051150.051.41
Thawte Certification980.04950.040.26
NetLock Halozatbiztonsagi Kft.980.04960.04-0.79
Unizeto Sp. z o.o.970.04960.04-1.80
OCC970.04930.041.37
IceWarp Software900.04910.04-3.88
Digital Signature Trust Co.840.04860.04-5.07
ICS_TREE770.03770.03-2.81
Equifax Secure Inc720.03700.03-0.04
GlobalSign Inc680.03540.0222.38
RM660.03590.038.72
Firstserver, Inc.650.03560.0212.81
CRU640.03580.037.24
CNRS620.03620.03-2.81
Azero620.03630.03-4.35
Positive Software Corporation610.03500.0218.57
United Network Communications Co., Ltd.590.03590.03-2.81
Sun Microsystems Inc570.02540.022.59
Japan Certification Services, Inc.560.02540.020.79
ICP-Brasil560.02530.022.69
XYZ Corporation540.02550.02-4.58
MULTICERT-CA530.02470.029.59
Trusted Secure Certificate Authority510.02410.0220.89
Stunnel Developers Ltd500.02500.02-2.81
UniCERT Brasil Certificadora480.02450.023.67
My Company Ltd480.02420.0211.07
Baltimore Technologies Japan Co.,Ltd.470.02480.02-4.84
WebMoney Transfer460.02460.02-2.81
NTT Communications Corporation430.02460.02-9.15
SCNC410.02410.02-2.81
FNMT390.02350.028.30
DFN-CERT Services GmbH390.02330.0114.86
Beocity380.02380.02-2.81
StartCom Ltd.370.02320.0112.37
University of Maryland360.02350.02-0.04
Hostgator360.02340.012.90
Webmin Software350.01290.0117.30
Etisalat350.01320.016.30
SuSE Linux Web Server340.01340.01-2.81
Temp Certificate!330.01330.01-2.81
S1 Corporation320.01300.013.67
Carnegie Mellon University320.01320.01-2.81
CETI320.01320.01-2.81
IceWarp Ltd.310.01280.017.60
Audkenni hf.310.01310.01-2.81
A-Trust Ges. f. Sicherheitssysteme im elektr. Datenverkehr GmbH310.01300.010.43
cv. Candi Internet300.01300.01-2.81
Advanced Extranet Server300.01310.01-5.95
University of Helsinki290.01280.010.66
Stalker Software, Inc.290.01360.02-21.71
Pro Futuro S.A.290.01290.01-2.81
Epsylon290.0100.00N/A
CFC290.01290.01-2.81
domainsofnote.com280.01280.01-2.81
Massachusetts Institute of Technology270.01240.019.34
Franke & Partner260.01260.01-2.81
BlueHost.Com260.0100.00N/A
websitewelcome.com250.01240.011.24
XCOM250.01240.011.24
University of Washington250.0100.00N/A
NeoNova B.V.250.01250.01-2.81
ISPAdmin250.0100.00N/A
INFN250.01250.01-2.81
E-Telbank Sp. z o.o.250.01240.011.24
Default Web Site250.01250.01-2.81

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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