Create digital signatures for PDF documents with PHP


Digital sign PDF documents with PHP

PDF Document Level Timestamp

This demo adds document level timestamp (PDF 2.0) to a PDF document.

A document level timestamp establishes the exact contents of the complete PDF file at the time indicated by the time stamp. The timestamp signature is created by an external time stamp server, so no signature process is done locally. The communication between the component and the timestamp server conforms to RFC 3161.

Select or upload a file

The uploaded files are bound to your browser session and are not accessible by any other user. They will get deleted after 24 hours automatically.

Time stamp server:

To validate the timestamp signatures make sure that the root certificate of the timestamp authority (Freetsa CA Certificate or Microsec e-Szigno Test Root CA 2008) is added as a trusted identity.