# Australian Defence Public Root CA root certificate (Department of Defence Australia)

> Australian Defence Public Root CA is a root CA certificate operated by Department of Defence Australia (RSA 2048, valid until 2036-11-28, SHA-256 209E956A). As of the latest CCADB data it is trusted for TLS server authentication by 1 of 4 major root stores: Microsoft.

Source: https://ssl.sh/roots/defence-australia-australian-defence-public-root-ca/
Last updated: 2026-11-10

Australian Defence Public Root CA is a root CA certificate operated by Department of Defence Australia (RSA 2048, valid until 2036-11-28, SHA-256 209E956A). As of the latest CCADB data it is trusted for TLS server authentication by 1 of 4 major root stores: Microsoft.

| Field | Value |
|---|---|
| CA owner | Department of Defence Australia |
| Subject | CN=Australian Defence Public Root CA,OU=CAs,OU=PKI,OU=DoD,O=GOV,C=AU |
| SHA-256 | 209E956AF04DF3996507C887D356230D6EB49FDBDD2D8A058FF50B8F80F690AA |
| SPKI SHA-256 | 4EF7DACF77EDB751F704035FB5C6C442351EC7220AF90BDF82FD047BD3C24187 |
| Valid from | 2016-11-28 |
| Expires | 2036-11-28 |
| Key | RSA 2048 |
| Signature algorithm | sha256WithRSAEncryption |
| Serial number | 29EB9233464F3241FF831900A9ADC4D9F8E3E27F |
| SHA-1 (Windows thumbprint) | A9CAFE9DFD67F4145AD397D0E2F3050D198DE6EE |

## Root store status

| Root store | Status | Trusted for TLS | Distrust for TLS after | Details |
|---|---|---|---|---|
| Chrome | Not included | No | - | - |
| Mozilla | Not included | No | - | - |
| Apple | Not included | No | - | - |
| Microsoft | Included | Yes | - | Trusted EKUs: Server Authentication, Client Authentication, Code Signing, Encrypting File System, IP Security Tunnel Termination, IP Security User, Secure Email, Time Stamping, IP Security End System; Not-before cutoff: 2020-06-01 (Code Signing) |

The CCADB lists no EV policy OID for Australian Defence Public Root CA.

## Intermediate CAs issued by this root

The CCADB lists no intermediate CA certificate signed directly by Australian Defence Public Root CA.


## Cross-signed versions

No certificate in the CCADB has the same subject and public key as Australian Defence Public Root CA with a different issuer, so a client has to carry Australian Defence Public Root CA itself in its root store to trust it.


## What happens when it expires

Australian Defence Public Root CA is valid until 2036-11-28, about 10.1 years after this data snapshot (2026-11-10). From that day, browsers and operating systems that check trust-anchor expiry stop accepting chains that end at this root, so any certificate that can only chain to it fails validation. Android is a known exception: it does not enforce the expiry date of trust anchors.

## FAQ

**Is Australian Defence Public Root CA trusted by Chrome, Firefox, Safari and Windows?**

As of 2026-11-10, Microsoft trust it for TLS server authentication; Chrome, Mozilla, Apple do not.

**When does Australian Defence Public Root CA expire?**

On 2036-11-28, about 10.1 years after the 2026-11-10 data snapshot.

**How many intermediate certificates has Australian Defence Public Root CA issued?**

The CCADB lists no intermediate certificate signed directly by Australian Defence Public Root CA.

**Is Australian Defence Public Root CA cross-signed?**

No. The CCADB has no certificate with the same subject and public key signed by another CA.

Sources: CCADB TLS Server Authentication report, All Included Root Certificate Trust Bit Settings, All Certificate Information (V5), the per-store TLS reports and Mozilla's Included CA Certificate Report (ccadb.org/resources).