System and method to digitally validate a document, the method including: receiving, by a secure development platform (SDP), a security information from an end user, the SDP comprising an SDP processor coupled to a secure SDP memory; exchanging a security token with a user device based upon the security information; receiving, from the user device, a request for a digital certificate; managing and storing public/private key pairs; transmitting, to the PKI service processor, the request for a digital certificate; if information in the request for a digital certificate is correct: creating the digital certificate; and receiving the digital certificate from the PKI service processor; and storing the digital certificate in the secure SDP memory, the secure SDP memory not directly accessible by the user device, the SDP processor configured to request a signature generation by use of the private key associated with the digital certificate, the SDP processor configured to request a validation by use of the digital certificate.