Integration of Digital Signature issued by Government/Partners in Pen Drive to sign pdf reports

Description:
I am looking for guidance on integrating digital signature certificates issued by the government or trusted partners, stored in a pen drive, into ERPNext modules. The objective is to enable users to sign generated reports and PDFs using their digital signature certificates.

Background:
In ERPNext, we generate various reports and PDF documents that require digital signatures for authentication and verification. We want to leverage the digital signature certificates issued by the government or trusted partners, which are stored in a pen drive, to provide a secure and legally recognized signing mechanism within the ERPNext platform.

hoping for a suggestion from the community