Are you new to CAcert? 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

1. Advent: Adventskalender der Kryptographie für Kinder und Erwachsene

Hilfe, die Spione wollen die Weihnachtsgeschenke klauen! Krypto und Kryptina (und Hund Kryptix) brauchen deine Hilfe, um das zu verhindern! Sofort anmelden und jeden Tag mithelfen – bis am 24. Dezember Machen Sie Kinder und Schulklassen in Ihrem Umfeld auf Krypto im Advent aufmerksam! Kategorie für Klassen 3-6 und Kategorie für Klassen 7-9 an Verschlüsselung […]

CAcert moves to Europe

EN CAcert Inc, the association that runs the infrastructure on behalf of the international CAcert community moves from New South Wales to Europe. This was a project and a dream for many years. On the annual general meeting 2020 the members of CAcert Inc vote with a large majority to adapt the statutes. DE An […]

Mozilla Firefox is blocking websites – how to get access again

You are on the Internet with Firefox. So far, this was actually not a bad decision. However, when connecting to an error now occurs. The OCSP response contains outdated information. Error code: SEC_ERROR_OCSP_OLD_RESPONSE This surprises you, because you have previously expressed your trust in the CAcert (CA Cert Signing Authority) root certificate. Today, however, […]

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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
  • BSB: 032073
  • Account No.: 180264

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