Common
DNS Certification Authority Authorization
Internet security policy mechanism
DNS Certification Authority Authorization
DNS Certification Authority Authorization (CAA) is an Internet security policy mechanism for domain name registrants to indicate to certificate authorities whether they are authorized to issue digital certificates for a particular internet domain name. Registrants publish a "CAA" Domain Name System (DNS) resource record, which compliant certificate authorities verify before issuing digital certificates. CAA was drafted by a pair of computer scientists, Phillip Hallam-Baker and Rob Stradling, in response to increasing concerns about the security of publicly trusted certificate authorities. It is an Internet Engineering Task Force (IETF) proposed internet standard.
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