The current version of B-Trust BISS is 3.46 (as of 30/09/2026). patchletter checks the official source daily and emails you new releases.
B-Trust BISS at a glance
B-Trust BISS is a Windows application from the Bulgarian trust service provider B-Trust, part of BORICA AD. It connects browsers and web portals to signature cards and certificates so that users can sign documents with qualified electronic signatures and log in to e-government and banking portals.
B-Trust provides the software on its website; new versions appear when browsers, operating systems or the requirements of connected portals change.
Because BISS runs as a local background service, check after an update that signing still works in the portals you use. Older versions are sometimes rejected by portals. Companies with Bulgarian sites or business partners should deploy it through software distribution together with the matching card drivers.
Version history & changelog · as detected by patchletter
| Version | Channel | Date | Notes |
|---|---|---|---|
| 3.46 | STABLE | 30/09/2026 | Release notes → |
Frequently asked questions
- What is the latest version of B-Trust BISS?
- B-Trust BISS 3.46, released 30/09/2026. patchletter checks the vendor's official source daily for new releases.
- Where can I find the B-Trust BISS release notes?
- The version history above links to the vendor's official release notes where the vendor publishes them. patchletter deliberately stores no vendor full texts.
- How do I get notified about new B-Trust BISS updates?
- Tick B-Trust BISS off in the catalogue and leave your address. From then on new versions go out by email — one at a time, or bundled in the daily or weekly digest.
An email as soon as a new B-Trust BISS version ships
We reconcile the vendor source daily. When a new version appears, it lands in your inbox right away or bundled as a digest. The update email is free and ends with one click. Alerts about vulnerabilities and end of support are part of patchletter Pro.
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[](https://patchletter.com/en/software/b-trust-biss)https://patchletter.com/badge/b-trust-biss.svgAlso available: ?v=eol (end of support) and ?v=cve (actively exploited).
