What a reader offers a security handler to open an encrypted document: a password, a certificate, or another secret.
public abstract class PdfCredentials
ISO 32000-2 §7.6.4 (passwords for the standard security handler) and §7.6.5 (certificates for public-key handlers). A handler accepts the kinds it understands and treats others as no credential.
kind:method, kind:property, kind:ctor. Press Esc to clear.PdfCredentials()Initializes a new instance of the PdfCredentials class.