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	April 2011 Count	April 2011 %	March 2011 Count	March 2011 %	Growth %
GoDaddy.com, Inc.	137,502	16.72	132,837	16.38	2.03
Equifax (Geotrust)	128,545	15.63	143,027	17.64	-11.41
Verisign	88,760	10.79	88,977	10.97	-1.67
Comodo Limited	49,374	6.00	50,935	6.28	-4.45
GeoTrust, Inc.	35,974	4.37	23,436	2.89	51.31
Thawte	35,591	4.33	40,120	4.95	-12.55
Thawte, Inc.	31,582	3.84	27,669	3.41	12.51
DigiCert	29,946	3.64	27,953	3.45	5.60
GeoTrust Inc.	21,935	2.67	18,494	2.28	16.91
COMODO CA Limited	20,660	2.51	19,406	2.39	4.94
Unknown	20,607	2.51	20,273	2.50	0.20
Comodo CA Limited	19,224	2.34	18,484	2.28	2.52
Network Solutions L.L.C.	18,304	2.23	18,080	2.23	-0.21
GlobalSign nv-sa	15,942	1.94	15,607	1.93	0.69
GlobalSign	15,036	1.83	14,688	1.81	0.91
Starfield Technologies, Inc.	15,011	1.83	14,816	1.83	-0.13
Entrust, Inc.	10,598	1.29	10,325	1.27	1.18
SecureTrust Corporation	6,756	0.82	6,680	0.82	-0.31
TERENA	6,692	0.81	6,426	0.79	2.65
Alpha	5,638	0.69	4,827	0.60	15.13
SomeOrganization	4,608	0.56	4,510	0.56	0.71
StartCom Ltd.	4,439	0.54	3,762	0.46	16.31
Parallels	3,754	0.46	3,646	0.45	1.49
Akamai Technologies Inc	3,244	0.39	3,200	0.39	-0.07
SECOM Trust Systems CO.,LTD.	2,587	0.31	2,497	0.31	2.13
Cybertrust Japan Co., Ltd.	2,537	0.31	2,254	0.28	10.95
SWsoft, Inc.	2,341	0.28	2,423	0.30	-4.76
Root CA	1,905	0.23	1,921	0.24	-2.25
thawte, Inc.	1,852	0.23	1,805	0.22	1.14
Sun Microsystems Inc	1,843	0.22	1,877	0.23	-3.21
CAcert Inc.	1,763	0.21	1,700	0.21	2.23
GeoTrust Inc	1,686	0.20	1,537	0.19	8.13
Servision Inc.	1,681	0.20	1,670	0.21	-0.78
Unizeto Technologies S.A.	1,579	0.19	1,521	0.19	2.33
Cybertrust	1,360	0.17	1,451	0.18	-7.61
U.S. Government	1,344	0.16	1,356	0.17	-2.30
Betrusted Japan Co., Ltd.	1,274	0.15	1,528	0.19	-17.81
TC TrustCenter GmbH	1,266	0.15	1,260	0.16	-0.96
SECOM Trust.net	1,255	0.15	1,286	0.16	-3.80
Google Inc	1,125	0.14	1,027	0.13	7.98
Snake Oil, Ltd	1,088	0.13	1,132	0.14	-5.26
ips Certification Authority	993	0.12	1,003	0.12	-2.41
Register.com	989	0.12	974	0.12	0.09
Secure Business Services, Inc.	956	0.12	1,060	0.13	-11.10
Cybertrust Inc	950	0.12	917	0.11	2.12
ispgateway	929	0.11	915	0.11	0.08
UIC	888	0.11	880	0.11	-0.53
GTE Corporation	871	0.11	866	0.11	-0.86
QuoVadis Limited	868	0.11	957	0.12	-10.59
Trusted Secure Certificate Authority	817	0.10	812	0.10	-0.82
none	715	0.09	688	0.08	2.44
Internet2	710	0.09	343	0.04	104.04
GANDI SAS	661	0.08	644	0.08	1.17
T-Systems Enterprise Services GmbH	582	0.07	657	0.08	-12.68
NetLock Halozatbiztonsagi Kft.	517	0.06	519	0.06	-1.81
AusCERT	508	0.06	506	0.06	-1.04
National Institute of Informatics	498	0.06	434	0.05	13.11
EUNETIC GmbH	470	0.06	460	0.06	0.72
Firstserver, Inc	439	0.05	427	0.05	1.34
Parallels, Inc.	413	0.05	411	0.05	-0.95
Entrust.net	405	0.05	443	0.05	-9.88
Government of Korea	403	0.05	375	0.05	5.93
OVH SAS	384	0.05	373	0.05	1.48
OCC	354	0.04	357	0.04	-2.26
Apache HTTP Server	341	0.04	321	0.04	4.71
WTF ALFA	340	0.04	336	0.04	-0.25
TBS INTERNET	336	0.04	344	0.04	-3.72
Sonera	324	0.04	336	0.04	-4.95
Globe Hosting, Inc.	321	0.04	283	0.03	11.81
FNMT	321	0.04	312	0.04	1.42
Internet Widgits Pty Ltd	311	0.04	307	0.04	-0.14
ICP-Brasil	302	0.04	301	0.04	-1.10
TAIWAN-CA.COM Inc.	286	0.03	295	0.04	-4.43
Autistici/Inventati	267	0.03	330	0.04	-20.25
SYS-CON Media	256	0.03	207	0.03	21.91
Zimbra Collaboration Suite	246	0.03	236	0.03	2.75
RBC Hosting Center	246	0.03	234	0.03	3.63
TDC	242	0.03	257	0.03	-7.18
SonicWALL, Inc.	240	0.03	237	0.03	-0.18
WebSpace-Forum, Thomas Wendt	235	0.03	239	0.03	-3.08
T-Systems International GmbH	221	0.03	152	0.02	43.32
OptimumSSL CA	200	0.02	209	0.03	-5.67
XX	198	0.02	197	0.02	-0.93
Getronics PinkRoccade Nederland B.V.	193	0.02	189	0.02	0.66
Digi-Sign Limited	184	0.02	192	0.02	-5.53
SiteGround LLC.	179	0.02	190	0.02	-7.13
IPS Certification Authority s.l.	176	0.02	203	0.03	-14.54
InterWorx	171	0.02	172	0.02	-2.00
WoSign, Inc.	159	0.02	178	0.02	-11.95
America Online Inc.	157	0.02	159	0.02	-2.67
My Company Ltd	151	0.02	144	0.02	3.36
Positive Software	148	0.02	143	0.02	2.02
Ministere education nationale (MENESR)	147	0.02	144	0.02	0.63
New Dream Network, LLC.	139	0.02	140	0.02	-2.13
Universitaet Heidelberg	138	0.02	0	0.00	N/A
HTTPS Management Certificate for SonicWALL (self-signed)	137	0.02	140	0.02	-3.54
XRamp Security Services Inc	136	0.02	137	0.02	-2.15
Wells Fargo	131	0.02	0	0.00	N/A
TNC	130	0.02	138	0.02	-7.14
TAIWAN-CA INC.	130	0.02	0	0.00	N/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.