What is "cacert.org"

CAcert.org is a community-driven certificate authority that issues free public key certificates to the public. CAcert has over 334,000 verified users and has issued over 1,285,000 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 ( SSL) 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.