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# Time Stamp Authority

Time Stamp Authorities (TSA) issue digitally signed timestamps (RFC 3161) that are optionally used during signed PDF export.

Adding a trusted timestamp to an electronic signature provides a digital seal of data integrity and a trusted date and time of when the transaction took place. Recipients of documents with a trusted timestamp can verify when the document was digitally or electronically signed, as well as verify that the document was not altered after the date the timestamp vouches for.

Untuk mengakses fungsi ini...

Choose LibreOffice - Preferences Tools - Options - LibreOffice - Security - TSAs

## List of Time Stamp Authorities

Display the list of existing TSAs.

## Add

Opens the Name dialog to enter a new Time Stamping Authority URL.

## Delete

Deletes the selected entry in the list. Deletion is immediate and does not display a confirmation dialog.

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