Prove When Documents and Data Existed

A trusted timestamp proves that a document or a piece of data existed at a given moment and has not changed since. It keeps digital signatures verifiable after the signing certificate expires, and it turns logs, archives and records into reliable evidence. We offer two timestamping solutions, depending on who needs to trust the timestamp and how many you need.

TSA Server: Your Own Time Stamping Authority

TSA Server turns a Windows server into your own RFC 3161 Time Stamping Authority, running inside your infrastructure, with your keys and your certificate. It is designed for high-volume internal use: code signing, signed internal documents, application audit trails, log sealing and networks without internet access. A one-time license covers an unlimited number of timestamps.

Visit the TSA Server website →

eIDAS Qualified Timestamps

Qualified timestamps are issued by a Qualified Trust Service Provider listed in the EU Trusted Lists. Under the eIDAS Regulation, they carry a legal presumption of accurate time and data integrity in every EU Member State, and they are recognised out of the box by Adobe Acrobat and EU validation tools. Use them for contracts, e-invoices, archives and any document that third parties must accept.

Get qualified timestamps at qtsa.eu →

Which One Do I Need?

Choose TSA Server when the timestamps are used and verified inside your organization, when you need very high volumes, or when your network has no internet access. Choose qualified timestamps when courts, authorities or business partners must accept the timestamp without questions. Many organizations combine both. For a detailed comparison, read Qualified vs Self-Hosted Timestamping.