Certificates were originally defined by ITU (CCITT) and the latest definitions are described in , but those definitions are (as always) not working.
Working certificate definitions for the Internet Community are found in the the PKIX RFCs and . The parsing of certificates in the Erlang/OTP SSL application is based on those RFCS.
Certificates are defined in terms of ASN.1 ().
For an introduction to ASN.1 see
Certificate handling is now handled by the
DER encoded certificates returned by