FreeTSA - Guide: How to sign documents files with time stamp > LibreOffice 5

LibreOffice is a free and powerful office suite.You can get this program from:

Open LibreOffice

1 - Go to "Tools"

2 - "Options..."

3 - Go to "Security"

4 - Click on "TSAs..."

5 - Click on "Add..."

6 - Add the URL: and Click Ok;

7 - The URL should appear in the list.

8 - Press Ok to exit. Open "LibreOffice Writer". Now create and save your document or use a existing one already saved.

9 - Go to "File"

10 - Go to "Export as PDF ..."

11 - Select the "Digital Signature" tab and click on "Select"

12 - You may have several digital certificates here (it uses the Windows Certificate Store in Windows), select the one you want to use to digitally sign this document.

13 - Click "Ok" to confirm that you want to use the digital certificate you select

14 - Click OK

15 - Some digital certificates may be protect with a password, if you protected yours enter here the password

16 - This is optional information that you may enter, for example: "Germany", "", "I created this document"

17 - Select "" time stamping server

18 - Click on "Export" to create your PDF.

Congratulations your PDF document should now be Digitally Signed with FreeTSA Time Stamp on it.

Notice: The main limitation on OpenOffice 5 is that you can't change the hash used "SHA1" that really shouldn't be used for security related purposes like signing documents. There are external applications better for this purpose.

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Last update: October 2, 2015