CAA is a security measure or in simpler language, it is a standard that is designed to basically protect websites and help in preventing unauthorized SSL certificate. Certificate Authorities (CAs) is the powerful entity whose job is to make sure that every single SSL certificate is authorized by using different methods of domain validation. It is normally done by linking the particular SSL certificate with particular website using a particular domain. But the CA should be listed as an authorized issuer of certificate. As CAA specify which CAs are genuine and are allowed to issue certificate for a domain, it helps in preventing or minimizing chances of hacking or misusing SSL certificate.
How to create CAA record
In order to create a CAA record, DNS (Domain Name System) provider has to be contacted. List of CAs that you prefer should be provided so that unauthorized CAs can not issue SSL Certificates to your domain. If you did not provide with your preferred list of CAs, it automatically gives right to every single CA to issue SSL certificate to your domain, which can results in misuse of your domain by any other party.
Benefits of CAA
It helps in preventing illegal or unauthorized issuance of comodo SSL certificate.
Organization are also helped by limiting CAs they use.
The site owners are also benefited as they can now specify which Certificate Authorities (CAs) have the authority to issue SSL certificate to their domain name.
All the CAs have to check for the authenticity before issuing SSL certificate.
Need for CAA
As advantages of Certificate Authority Authorization (CAA) are clear, next thing that hits our minds is "Do I require CAA?". The appropriate response is clear… YES, we especially require CAA. As we probably aware CAA records are utilized to check the credibility of CAs i.e. which CA is approved to issue SSL certificate and it gives enormous measure of security from hacker. It additionally offers rights to the domain proprietor to bar specific CA. CA can't issue any Comodo SSL certificate without verification. At the end of the day, we can state that CAA can bring down the risk of issuing the SSL certificates by unapproved Certificate Authorities (CAs).
For any domain, CA can issue certificates and with increment in HTTPS, there is an expansion in SSL certificates. To put a control over this, a powerful approach was required. An approach that couldn't just decline the hazard yet put a stop on miss-issuance of SSL certificates. CAA is intended to stop unapproved issuance of SSL certificates.