PDF/A signed with iText7 allows changing attached documents without breaking a signature
I have created a PDF/A document using iText7. The created document has an attachment (). The attachment is a .csv file. Then the whole PDF/A has been signed. I have opened the attached .csv file and changed it after I have signed it. I have used following code to verify the signature: public PdfPKCS7 verifySignature(SignatureUtil util, String name) throws GeneralSecurityException, IOException { System.out.println("Signature covers whole document: " + util.signatureCoversWholeDocument(name)); System.out.println("Document revision: " + util.getRevision(name) + " of " + util.getTotalRevisions());