A p12d file extension is related to the DigiDoc, a digital signature and cryptographic computing file format. A p12 file stores PKCS#12 certificate.
P12D file extension - DigiDoc PKCS#12 certificate
What is p12d file? How to open p12d files?
File type specification:
The p12d file extension is associated with the DigiDoc, a family of digital signature and cryptographic computing file formats utilizing a public key infrastructure.
The p12d file contains PKCS#12 certificate.
MIME types:
application/x-p12d