The invention discloses a digital
certificate authentication method and device based on a post-
quantum algorithm, equipment and a medium, and relates to the field of
information security, and the method comprises the steps: obtaining digital
certificate application information of a target entity for auditing; if the digital
certificate request passes the
verification, analyzing the digital certificate request submitted by the target entity, and obtaining a key
encryption key of the digital certificate request by using a post-
quantum key encapsulation algorithm after
verification; then obtaining
user information of the target entity and an active cryptographic
algorithm public key value in the digital certificate request, generating an anti-
quantum-
attack digital certificate according to the
user information and a public key, and signing and issuing the anti-quantum-
attack digital certificate to the target entity; the digital certificate comprises a post-quantum key packaging public key, a post-
quantum signature public key and an active-service public key
password public key
ciphertext of the entity. According to the application, the public key data of the traditional public key cryptographic algorithm can be protected, the quantum computing
attack is resisted, the public key
plaintext of the traditional public key cryptographic algorithm can be obtained in the
service system, and the influence on the original service using the traditional public key cryptographic algorithm is extremely low.