Are you new to CAcert?

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 .

Latest News

Safer Internet Day 2016

On 2016-02-09 is this year’s Safer Internet Day[1] asking its participants to “Play your part for a better internet!” The Safer Internet Day was first celebrated in 1999 to strengthen the awareness for security within and on the internet. CAcert’s share in this effort is providing everybody the means to protect their communication by sending […]

CAcert at FOSDEM 2016, Jan 30th -31st

CAcert will be present at FOSDEM 2016, the Free and Open Source Software Developers’ European Meeting, on January 30th – 31st. Booth (Sat + Sun) CU at FOSDEM …

Re-Signing Root Certificate

On Friday, 29th January 2016, the long-planned re-signing of CAcert’s root certificate will finally take place. This action has been overdue for quite some time now as several browser and OS vendors have dropped support for MD5-signed certificates or otherwise made such certificates unusable. The re-signing process [1] has been tested successfully at last FrOSCon […]

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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


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