CAcert は初めてですか?

CAcert.org is a community-driven Certificate Authority that issues certificates to the public at large for free.

CAcert's goal is to promote awareness and education on computer security through the use of encryption, specifically by providing cryptographic certificates. These certificates can be used to digitally sign and encrypt email, authenticate and authorize users connecting to websites and secure data transmission over the internet. Any application that supports the Secure Socket Layer Protocol (SSL or TLS) can make use of certificates signed by CAcert, as can any application that uses X.509 certificates, e.g. for encryption or code signing and document signatures.

If you want to have free certificates issued to you, join the CAcert Community .

If you want to use certificates issued by CAcert, read the CAcert Root Distribution License .This license applies to using the CAcert root keys .

最新ニュース

Stability of e-mail verification strongly improved

The e-mail verification on the CAcert web server has recently led to repeated support requests. An analysis of the log files in our data center showed that the corresponding error occurred more frequently. So we have to conclude that many CAcert users have been negatively affected. In order to avoid further negative effects, an emergency […]

Software update for secure mail servers

When you add an new email address to your profile, the verification works now also on secure mail server handling TLS1.1 or TLS 1.2. CAcert’s software team has updated our software to get more possibilities to our community members.

CAcert at Fosdem 2019

On February, 2nd and 3rd, Fosdem in Brussels (Belgium) will open its doors. It is an ideal platform to get informed about free software – and of course CAcert will attend. The fair takes place in the ULB Campus. But: This time CAcert and secure-u will NOT have stand there due to limited space in the builings. On […]

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For CAcert Community Members

Have you passed the CAcert Assurer Challenge yet?

Have you read the CAcert Community Agreement yet?

For general documentation and help, please visit the CAcert Wiki Documentation site .For specific policies, see the CAcert Approved Policies page.

Do you want to help CAcert?

We are facing an uphill battle to fund this service and could do with your help?
If you can, please donate.
AU$50 per year for this button
or a one off donation for this button whatever you can afford to help

If you are located in Australia, use bank transfer instead.

CAcert bank account details:

  • Account Name: CAcert Inc
  • SWIFT: WPACAU2S
  • BSB: 032073
  • Account No.: 180264


If you want to participate in CAcert.org, have a look here and here.
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