But that's OK, there's a start for a PEM-ifier in the older answer (though "CERTIFICATE" and cert.RawData) would need to come from parameters). //--> More info about Internet Explorer and Microsoft Edge, System.Security.Cryptography.X509Certificates. /* Artikel */ //} google_ad_client = "ca-pub-6890394441843769"; For signing we need two different ways: use instance of X509Certificate2 similar as used in class PdfDigitalSignatureDetails in Aspose.Words for signing PDF during export to PDF. = Returns the effective date of this X.509v3 certificate. Initializes a new instance of the X509Certificate2 class using information from a byte array. When the certificate is installed by using the X509Certificate or X509Certificate2 class, X509Certificate or X509Certificate2 by default creates a temporary container to import the private key. public.pub is just the certificate. An example to export the machine certificate (with Thumbprint: 1C0381278083E3CB026E46A7FF09FC4B79543D) of an computer, Or load a certificate from a file and convert it to pem format,