Certificate authentication device as well as access method and certificate update method thereof

The invention discloses a certificate authentication device which comprises a normal storage module, a storage control module and an interface module, wherein the normal storage module is connected with the storage control module, and the storage control module and the interface module are connected. The certificate authentication device further comprises a safety storage module, an operation processing module and a safety control module, wherein the safety storage module is respectively connected with the operation processing module and the safety control module and used for storing private information for certificate authentication; the operation processing module is used for performing hardware acceleration on an encryption algorithm; and the safety control module is connected with the storage control module and used for scheduling the operation processing module to perform operation and controlling the safety storage module to perform data storage and output. The certificate authentication device disclosed by the invention can have a higher certificate authentication speed under the condition of ensuring the safety. The invention further discloses an access method and a certificate update method based on the certificate authentication device so as to realize the access of the certificate authentication device and the update of the certificate.