Certificate authority
A-Trust
A-Trust operates 2 root certificate(s) trusted for TLS by at least one major root store (CCADB owner: A-Trust; country: AT). See fingerprints, expiry and Chrome, Mozilla, Apple and Microsoft status.
Details
- CCADB CA owner
- A-Trust
- Country
- AT
- Country (CCADB)
- Austria
- Roots
- 2
- Roots trusted for TLS
- Chrome 0 · Mozilla 0 · Apple 0 · Microsoft 2
- Intermediates under its roots
- 0 (0 valid)
- Auditor
- Zentrum für sichere Informationstechnologie - Austria (A-SIT)
CAA records
The CCADB lists no recognized CAA domain for the valid intermediates of A-Trust. Section 4.2 of a CA's CP/CPS has to state the issuer domain names it accepts in CAA records, so check that document.
For issuewild, iodef or DNS-provider formats, use the CAA record generator: CAA Generator
Root certificates (CCADB)
A-Trust has 2 root certificate(s) in the CCADB TLS report. Together they have signed 0 intermediate CA certificates, 0 of them still valid.
Roots this CA owner has in the CCADB TLS Server Authentication report, with current status in each root store.
- trusted for TLS
- included with limits (NotBefore / no TLS bit)
- removed or blocked
- not included
| Root certificate | Key | Expires | Ch | Mo | Ap | MS | Intermediates |
|---|---|---|---|---|---|---|---|
| A-Trust-Root-07 | RSA 4096 | 2036-11-19 | Not included | Not included | Not included | Included | 0 (0) |
| A-Trust-Root-09 | RSA 4096 | 2036-07-14 | Not included | Not included | Not included | Included | 0 (0) |
Audits
Audit data the CCADB records for the TLS roots of A-Trust. Auditor(s): Zentrum für sichere Informationstechnologie - Austria (A-SIT). The most recent audit period ended on 2025-12-14.
CP/CPS documents
Certificate Policy and Certification Practice Statement links that A-Trust has disclosed in the CCADB for its TLS roots, with effective dates:
- CP/CPS: https://www.a-trust.at/downloads/de/Certificate%20Practice%20Statement/a-sign-ssl-ev/a-sign-ssl-ev_cps.pdf (effective 2024-08-29)
- CP/CPS: https://www.a-trust.at/downloads/Downloads/Certificate%20Practice%20Statement/a-sign-ssl-ev/a-sign-ssl-ev_cps.pdf (effective 2024-08-29)
- Document repository: https://www.a-trust.at/de/Support/Downloads/Certificate%20Practice%20Statement/
Report a certificate problem
To report a mis-issued certificate, a compromised private key or other abuse, use the channels A-Trust lists in the CCADB (replace [at] and [dot] in addresses):
servicecenter[at]a-trust[dot]at
Incident reports
CAs in Mozilla's root program file compliance incident reports in Mozilla's Bugzilla (product CA Program, component CA Certificate Compliance). This search lists the bugs whose title contains the words “A-Trust”:
FAQ
What CAA record allows A-Trust to issue certificates?
The CCADB lists no recognized CAA domain for A-Trust; check section 4.2 of its CP/CPS.
Who audits A-Trust?
Zentrum für sichere Informationstechnologie - Austria (A-SIT), according to the CCADB. The latest TLS Baseline Requirements audit (ETSI EN 319 411) covers 2024-12-15 to 2025-12-14; the statement is dated 2026-03-11.
How do I report a problem certificate to A-Trust?
Use the channel(s) listed in the CCADB: servicecenter[at]a-trust[dot]at.
How many root certificates does A-Trust have?
2 in the CCADB TLS report. Trusted for TLS: Chrome 0, Mozilla 0, Apple 0, Microsoft 2. They have signed 0 intermediates, 0 of them still valid.