You can't. The dedicated digital signature server is a customized non-universal device. The dedicated digital signature servers developed by the First Research Institute of the Ministry of Public Security are not compatible, and other dedicated digital signature servers not designated by the First Research Institute of the Ministry of Public Security are not allowed to prevent security risks caused by illegal device access. Signature verification server, also known as digital signature server, is a special server that provides digital signature services based on digital certificates for all kinds of electronic data and verifies the authenticity and validity of the signature data.