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John Hewson commented on PDFBOX-2001: ------------------------------------- Yes, get the same with OS X Preview and Foxit. Acrobat displays some extra information saying that the validity of the signature is unknown, but we don't support that (and neither do most readers). > Digital Signature information (parser bug?) > ------------------------------------------- > > Key: PDFBOX-2001 > URL: https://issues.apache.org/jira/browse/PDFBOX-2001 > Project: PDFBox > Issue Type: Bug > Components: Parsing > Affects Versions: 1.8.3 > Reporter: Nicolas Kaczmarski > Assignee: Andreas Lehmkühler > Attachments: D.1_signiert.pdf, PDFBOX2001-D.1_signiert1.png, > acrobatSignatureExample.PNG > > > We have a signed PDF but signature is described without key "Sig". > As you can see in the standard PDF 32000-1:2008 - Table 252 - Entries in a > signature dictionary, this key is optional : > "(Optional) The type of PDF object that this dictionary describes; if > present, shall be Sig for a signature dictionary. " > But PDFBox seems to limit its research of signature only if this key "Sig" is > present. > What is your position about that? -- This message was sent by Atlassian JIRA (v6.3.4#6332)