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

Removal of OTP login feature

The software team has removed the One Time Password (OTP) login feature. This step became necessary after a number of issues in the code were detected that might aid malicious users to compromise foreign accounts. Due to the complexity and some necessary structural changes to fix the problems, the feature will not return anytime soon. CAcert Arbitration is […]

Safer Mail! – Ingolstadt, DE

Am 21. November bietet die Linux und Unix User Group Ingolstadt mit den Bürgernetzvereinen ASAMnet und bingo in Ingolstadt eine Informationsveranstaltung mit Workshop an: Safer Mail! Sichere E-Mail-Verschlüsselung mit S/MIME Neben einer Einführung ins Thema werden die Grundlagen erklärt. Der Workshop gibt anschließend praktische Hilfe beim Einrichten der jeweiligen E-Mail-Programme für Verschlüsselung und Signatur. Am […]

CAcert @ OpenRheinRuhr 2014, Oberhausen, DE

Am 8. und 9. November findet die OpenRheinRuhr im Rheinischen Industriemuseum direkt am Hauptbahnhof in Oberhausen statt. Eine Spitzenlocation für eine Veranstaltung über freie Software, bei der CAcert nicht fehlen darf. Jeder Interessierte kann sich am Stand von CAcert über kostenfreien Zertifikate, darunter SSL-Serverzertifikate und Client-Zertifikate für sichere E-Mail-Kommunikation informieren. Fragen zur Benutzung und zum […]

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For CAcert Community Members

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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.

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