# A-Trust: root certificates and root store status

> 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.

Source: https://ssl.sh/cas/a-trust/
Last updated: 2026-11-10

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.


## 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.

| Root certificate | Key | Expires | Chrome | Mozilla | Apple | Microsoft | Intermediates | SHA-256 |
|---|---|---|---|---|---|---|---|---|
| A-Trust-Root-07 | RSA 4096 | 2036-11-19 | Not included | Not included | Not included | Included | 0 | 8AC552AD577E37AD2C6808D72AA331D6A96B4B3FEBFF34CE9BC0578E08055EC3 |
| A-Trust-Root-09 | RSA 4096 | 2036-07-14 | Not included | Not included | Not included | Included | 0 | 7A38F708A35A31E42E1CF3220F9A2D273E7666354618B2464657D43D8E77ADC2 |

## 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.

## 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.

- Standard audit: ETSI EN 319 411 2024-12-15 – 2025-12-14 (https://www.a-sit.at/wp-content/uploads/2026/03/VIG-25-093_audit-attestation_a-trust_etsi_standard_audit_final_sig_HL.pdf)
- TLS Baseline Requirements: ETSI EN 319 411 2024-12-15 – 2025-12-14 (https://www.a-sit.at/wp-content/uploads/2026/03/VIG-25-093-TLS-BR_audit-attestation_a-trust_etsi_TLS-BR_audit_final_sig_HL.pdf)
- TLS EV Guidelines: ETSI EN 319 411 2024-12-15 – 2025-12-14 (https://www.a-sit.at/wp-content/uploads/2026/03/VIG-25-093-TLS-EV_audit-attestation_a-trust_etsi_TLS-EV_audit_final_sig_HL.pdf)

## 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
- CP/CPS: https://www.a-trust.at/downloads/Downloads/Certificate%20Practice%20Statement/a-sign-ssl-ev/a-sign-ssl-ev_cps.pdf

## 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”: https://bugzilla.mozilla.org/buglist.cgi?query_format=advanced&product=CA+Program&component=CA+Certificate+Compliance&short_desc_type=allwords&short_desc=A-Trust&order=changeddate+DESC

## 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.

Sources: CCADB All Certificate Information (V5), List of CAA Identifiers, List of CA problem reporting mechanisms and TLS Server Authentication report (ccadb.org/resources).