BISS (Browser Independent Signing Service) is software for signing with Qualified Electronic Signature (QES) when performing operations in the Internet browser. It uses technology that allows local electronic signature without using an active component. A major advantage of using BISS is its independence from the browser used and its restrictions or inability to support Java applets or ActiveX controls.
BISS provides QES certificates for all popular browsers under operating systems MS Windows 8, MS Windows 10, Linux Ubuntu 18.04 LTS/20.04 LTS and macOS Catalina. It works with each use of the private key of the QES certificate located on the smart card. BISS uses Microsoft CryptoAPI or PKCS11 library to access the smart card.
To use BISS, it is necessary to pre-install the service as an application on the workstation where the signing will be done - administrator rights are required.
Publisher’s description
What is BISS?
BISS by B-Trust is proprietary Windows software.
Installation and requirements
The publisher provides MSI installers for 32-bit Windows. The main installer is 98.3 MB. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches. An MSI package is available for deployment with Group Policy, Intune or Configuration Manager.
Pros / Cons
Pros
- MSI package for managed deployment
- Documented silent install
Cons
- Proprietary licence: check the terms and price
- No native ARM64 build
- 32-bit only
- Installation needs administrator rights
- No update for more than a year
In short: BISS is a Windows tool for 32-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Is BISS safe to download?
- The file is served by b-trust.bg, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
8F0DAAD0100E819B43D473E62F7C5FFAFE1BD26CBF7B1A7F1A15B2AF133D0577· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 3.46Latest | August 28, 2025 | 98.3 MB | 32-bit MSI |
Install from the command line
Silent install ›winget install --id B-trust.BISS -emsiexec /i BISS.msi /qn /norestartmsiexec /x {61CAB6CA-CC29-30AB-BADC-A87CB466211D} /qn /norestartRelated guide: How to use winget: install and update apps
Information
- Publisher
- B-Trust
- Licence
- Proprietary
- Price
- See the publisher’s site
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- MSI
- Version
- 3.46
- Released
- August 28, 2025
- Added to the catalogue
- May 6, 2026
- Versions listed
- 1
- Website
- b-trust.bg
- winget ID
- B-trust.BISS
- MSI product code
- {61CAB6CA-CC29-30AB-BADC-A87CB466211D}
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is BISS free?
BISS is proprietary (closed-source) software (licence: Proprietary). Whether it costs money depends on the edition: check the publisher’s site for prices and free tiers.
Is BISS safe to download?
The download comes from b-trust.bg, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install BISS with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can BISS be installed silently?
Yes. The silent install page lists the exact command for each installer, including msiexec for the MSI package.
Does BISS run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.