The invention provides a digital
certificate issuing method, a related device and a computer storage medium, and the method comprises the steps: carrying out the signature of protocol body data containing a digital
certificate based on
a site certificate and a
quantum key after the digital certificate is issued in a digital certificate
authentication system, and generating a certificate issuing protocol, after the certificate issuing
system receives the certificate issuing protocol, the site certificate and the
quantum key pair are adopted for
verification, after
verification is passed, the digital certificate is issued to the light
directory access protocol, and compared with the prior art, the
quantum attack resistance of the certificate issuing
system is effectively improved, and safety and effectiveness of digital certificate issuing are guaranteed.