# e-Szigno TLS Root CA 2023 root certificate (Microsec Ltd.)

> e-Szigno TLS Root CA 2023 is a root CA certificate operated by Microsec Ltd. (ECDSA P-521, valid until 2038-07-17, SHA-256 B4914150). As of the latest CCADB data it is trusted for TLS server authentication by 3 of 4 major root stores: Chrome, Mozilla, Microsoft.

Source: https://ssl.sh/roots/microsec-e-szigno-tls-root-ca-2023/
Last updated: 2026-11-10

e-Szigno TLS Root CA 2023 is a root CA certificate operated by Microsec Ltd. (ECDSA P-521, valid until 2038-07-17, SHA-256 B4914150). As of the latest CCADB data it is trusted for TLS server authentication by 3 of 4 major root stores: Chrome, Mozilla, Microsoft.

| Field | Value |
|---|---|
| CA owner | Microsec Ltd. |
| Subject | CN=e-Szigno TLS Root CA 2023,2.5.4.97=VATHU-23584497,O=Microsec Ltd.,L=Budapest,C=HU |
| SHA-256 | B49141502D00663D740F2E7EC340C52800962666121A36D09CF7DD2B90384FB4 |
| SPKI SHA-256 | 47487900A1BEB9EE08CCBC1116A8EC55F454B638994319F051B984023CED6423 |
| Valid from | 2023-07-17 |
| Expires | 2038-07-17 |
| Key | ECDSA P-521 |
| Signature algorithm | ecdsa-with-SHA512 |
| Serial number | E86F187BD6396B984A49980A |
| SHA-1 (Windows thumbprint) | 6F9AD5D5DFE82CEBBE3707EE4F4F52582941D1FE |

## Root store status

| Root store | Status | Trusted for TLS | Distrust for TLS after | Details |
|---|---|---|---|---|
| Chrome | Included | Yes | - | - |
| Mozilla | Included | Yes | - | Trust bits: Websites; EV policy OIDs: not EV-enabled; First included in: 3.121 / 149; Inclusion bug: #1873057 |
| Apple | Not included | No | - | - |
| Microsoft | Included | Yes | - | Trusted EKUs: Server Authentication, Client Authentication |

The CCADB lists no EV policy OID for e-Szigno TLS Root CA 2023.

## Intermediate CAs issued by this root

The CCADB lists 10 intermediate CA certificates signed directly by e-Szigno TLS Root CA 2023: 7 currently valid, 3 expired and 0 revoked (revoked includes those whose parent was revoked).

| Intermediate | Operated by | Expires | Status | SHA-256 |
|---|---|---|---|---|
| e-Szigno RSA TLS Root CA 2025 | Microsec Ltd. | 2038-07-16 | Valid | 23D2D00DE33B4B927DABCEF720A36EADB659E79625DBCE5336BE62D0AFCB92AA |
| e-Szigno Qualified TLS CA 2026 | Microsec Ltd. | 2029-03-17 | Valid | CBBA5AFBB7E493C2D1EDFBB3B162394BFCEC0345A66DC1A167B203D534FBC15F |
| e-Szigno OV TLS CA 2026 | Microsec Ltd. | 2029-03-17 | Valid | AD2AADACA897DEA22B889DDB381143049AD9975C0819B49350D6219019358A68 |
| e-Szigno DV TLS CA 2026 | Microsec Ltd. | 2029-03-17 | Valid | 243F58613E1D1F45DE482FD77BF57BBA1C92FF7596CBC3E020450499541F2BDB |
| e-Szigno DV TLS CA 2023 | Microsec Ltd. | 2028-05-29 | Valid | 9B9EE27704A2DF34063ABDD64C2B882861DD87885A3128405EB5EDE0B733D053 |
| e-Szigno OV TLS CA 2023 | Microsec Ltd. | 2028-05-29 | Valid | 663E65EB4EB152A8266A1BF475108B73ABC90BC8AD98B58BE16234B281279796 |
| e-Szigno Qualified TLS CA 2023 | Microsec Ltd. | 2028-05-29 | Valid | 2F419E32E54AF3A3F9BBC9CCF0B9D3AEB3D996D27CDB7891340DB1338DA3DB65 |
| e-Szigno Qualified TLS CA 2023 | Microsec Ltd. | 2026-07-18 | Expired | 9E4115FD70E2317E15BF811552610643B32818A0304AA3C97685A76465493261 |
| e-Szigno OV TLS CA 2023 | Microsec Ltd. | 2026-07-18 | Expired | 6F265CCE1F350817ED888C9A07CE8D117E6647090894971C405C0D72EC959D5C |
| e-Szigno DV TLS CA 2023 | Microsec Ltd. | 2026-07-18 | Expired | 076B30115E430F7C58EBBC1B79ECCE567704D9AA3DA15F5060855A880E237155 |

## Cross-signed versions

1 certificate(s) in the CCADB have the same subject and public key as e-Szigno TLS Root CA 2023 but a different issuer. A server can send one of them so that clients which trust the issuing root, but not e-Szigno TLS Root CA 2023, can still build a chain.

| Signed by | CA owner | Expires | Status | SHA-256 |
|---|---|---|---|---|
| Microsec e-Szigno Root CA 2009 | Microsec Ltd. | 2029-12-30 | Valid | 35328CDA9F14FEB62AC0CCAEE1B10101FD6F44ADD85A51311EA174FD361F4613 |

## What happens when it expires

e-Szigno TLS Root CA 2023 is valid until 2038-07-17, about 11.7 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 e-Szigno TLS Root CA 2023 trusted by Chrome, Firefox, Safari and Windows?**

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

**When does e-Szigno TLS Root CA 2023 expire?**

On 2038-07-17, about 11.7 years after the 2026-11-10 data snapshot.

**How many intermediate certificates has e-Szigno TLS Root CA 2023 issued?**

The CCADB lists 10: 7 valid, 3 expired and 0 revoked. The newest valid one is e-Szigno RSA TLS Root CA 2025, valid until 2038-07-16.

**Is e-Szigno TLS Root CA 2023 cross-signed?**

Yes. The CCADB has 1 cross-certificate(s) with its subject and key, signed by Microsec e-Szigno Root CA 2009; 1 of them are still valid.

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).