PdfTimestamperHashAlgorithm Property

Gets or sets the hash algorithm that hashes either:

• the bytes of the signature field within SignerInfo for the CMS-based Content if the generated timestamp token is included as an unsigned attribute of that SignerInfo (signature timestamp).
• the bytes of the document indicated by the ByteRange and the ByteRange shall specify the complete PDF file contents (excepting the Content value) if the generated timestamp token is included as a content of a signature dictionary (whose Type entry has a value of DocTimeStamp) that is a value of a signature field added as an incremental update (document timestamp).

Default value: SHA512.