Set up your own RFC 3161 Time Stamping Authority (TSA) in minutes. Our Time Stamp Server runs as an IIS application on any Windows server, giving you a self-hosted, trusted timestamping solution without a dedicated TSA appliance.
We provide eIDAS Qualified Timestamps issued by a Qualified Trust Service Provider (QTSP) listed in the European Union Trusted Lists (EUTL) under the eIDAS Regulation. If you need eIDAS Qualified Timestamps with full legal effect across the EU, visit our dedicated website (https://qtsa.eu).
Use it to prove when documents and data existed – for long-term validation (LTV) of digital signatures, copyright and IP protection, notarization, and code signing. It works out of the box with Adobe Acrobat, PDF Signer, and Microsoft Authenticode / JarSigner.
What Is RFC 3161 Trusted Timestamping?
A trusted timestamp is cryptographic proof that a piece of data existed at a specific moment in time and has not changed since. A Time Stamping Authority (TSA) issues these timestamps following the IETF RFC 3161 and RFC 5816 standards, binding a hash of your data to an accurate, signed time value.
Because the timestamp is signed by the TSA and anchored to a UTC time source, anyone can verify later when a document was signed or received – even years afterwards, and even after the original signing certificate has expired or been revoked. This is what makes trusted timestamping essential for the long-term validation (LTV) of digital signatures, electronic archiving, copyright and intellectual-property protection, and notarization.
Time Stamp Server for Adobe Acrobat & PDF Signing
Add RFC 3161 timestamps to your PDF signatures directly from Adobe Acrobat or our PDF Signer application. Once you point Acrobat to your Time Stamp Server URL, every signature is sealed with a trusted timestamp, producing PAdES-compatible documents suitable for long-term validation (LTV or LTA). PDF Signer includes the timestamping feature built in, so every document it signs is timestamped automatically using your Time Stamp Server.
Your Own On-Premise Timestamping Authority (TSA)
Run a complete, self-hosted TSA inside your own infrastructure. The Time Stamp Server installs as an IIS application on any Windows server, with no dedicated appliance and no per-timestamp or subscription fees. It works with your existing certification authority, supports HSM devices through PKCS#11, MS-CAPI and CNG, handles RSA keys up to 4096 bit and elliptic-curve certificates, and issues up to 100 timestamps per second.
Features
- IETF RFC 3161 and IETF RFC 5816 compliant (ESSCertID and ESSCertIDv2)
- Works with HSM (Hardware Security Module) devices
- PKCS#11, CNG (Cryptography Next Generation), and MS-CAPI support
- Support for Elliptic Curve certificates stored on Hardware Security Modules
- Supports up to 4096 bit RSA keys
- Easy to use through friendly programs like Adobe Acrobat or PDF Signer
- SHA-256, SHA-384 and SHA-512 support
- Microsoft Authenticode and Java Signature compliant
- Up to 100 timestamps per second
Requirements:
- Windows operating system with IIS
- Microsoft .NET Framework 4.8
Pricing & Licensing
| Product | Price |
| Time Stamp Server (Lifetime License) | Starting from 1450 EUR |
If you’re interested in our Time Stamp Server, please request a quote.
- One-time, lifetime license – no monthly, annual or per-use fees. When a new version is released, you can continue using your purchased version as usual.
- Free technical support and updates for 12 months after purchase (by email; response time usually under 24 hours).
- 60-day no-hassle, no-questions-asked money-back guarantee.
- Pay by card or by bank wire transfer.
Download & Live Demo
A fully functional version of our Time Stamp Server (RFC 3161 compatible) is available for testing before purchase.
Download Time Stamp Server for IIS (latest version: 7.0 – launched June 2026)
Frequently Asked Questions
Is this a hosted timestamping service or software I install?
It is software you install and own. The Time Stamp Server runs as an IIS application on your own Windows server, so you control the TSA entirely.
Is the Time Stamp Server RFC 3161 compliant?
Yes – it is compliant with IETF RFC 3161 and RFC 5816 (ESSCertID and ESSCertIDv2), with SHA-256, SHA-384 and SHA-512 support, and is also Microsoft Authenticode and Java Signature compatible.
Does it work with a Hardware Security Module (HSM)?
Yes. It works with HSM devices through PKCS#11, MS-CAPI and CNG, and supports RSA keys up to 4096 bit as well as elliptic-curve certificates.
Can I use it with Adobe Acrobat?
Yes. Configure the Time Stamp Server URL in Adobe Acrobat, and your signatures will be automatically timestamped.
Where can I get eIDAS Qualified Timestamps?
We provide eIDAS Qualified Timestamps issued by a Qualified Trust Service Provider (QTSP) listed in the European Union Trusted Lists (EUTL) according to the eIDAS Regulation. If you need eIDAS Qualified Timestamps, please visit our dedicated website (https://qtsa.eu).
Is there a trial before I buy?
Yes. You can test the Time Stamp Server in two ways. Try the RFC 3161 endpoint instantly through our online Time Stamp Server Live Demo, with no installation required.
Or download the full version for IIS and install it on your own Windows server to evaluate it in your environment. The download is fully functional for testing purposes.
If you’re interested in our Time Stamp Server, please request a quote.
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