Using Qoppa’s PDF library products, jPDProcess and jPDFSecure, it is possible to add a Document Time Stamp (DTS added in PDF 2.0) to a PDF document. Here is a sample java program that does so. PDFDocument doc = new PDFDocument(in, null); // Invisible signature field SignatureField field = doc.getPage(0).addSignatureField("Signature1", new Rectangle2D.Double(0, 0, 0, 0)); […]
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