Güvenilir bir TSA sunucusu aracılığıyla PDF'nize RFC 3161 zaman damgası ekleyin. Belgenizin belirli bir zamanda var olduğunu kanıtlar. Sertifika gerekmez.
Internet connection required
Timestamping requires contacting the selected TSA server to obtain a trusted timestamp token.
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Select the PDF document you want to timestamp
Select one of the trusted TSA servers
Apply the RFC 3161 timestamp and download your timestamped PDF
A document timestamp (RFC 3161) is a cryptographic proof that your PDF existed at a specific point in time. A trusted Time Stamp Authority (TSA) server signs a hash of your document along with the current time, creating a tamper-evident timestamp embedded in the PDF.
No. Unlike a digital signature, a document timestamp does not require a personal certificate. The TSA server provides the trusted timestamp using its own certificate.
No. Only a cryptographic hash (SHA-256) of your document is sent to the TSA server. Your actual PDF content never leaves your browser.
Yes. The tool creates a standard RFC 3161 document timestamp (ETSI.RFC3161 SubFilter) that is recognized by Adobe Acrobat and other major PDF viewers.