# Thailand National Root Certification Authority - G1 root certificate (Thailand NRCA (ETDA))

> Thailand National Root Certification Authority - G1 is a root CA certificate operated by Thailand NRCA (ETDA) (RSA 4096, valid until 2036-03-27, SHA-256 2A8DA2F8). 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/thailand-nrca-thailand-national-root-ca-g1/
Last updated: 2026-11-10

Thailand National Root Certification Authority - G1 is a root CA certificate operated by Thailand NRCA (ETDA) (RSA 4096, valid until 2036-03-27, SHA-256 2A8DA2F8). 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 | Thailand NRCA (ETDA) |
| Subject | CN=Thailand National Root Certification Authority - G1,OU=Thailand National Root Certification Authority,O=Electronic Transactions Development Agency (Public Organization),C=TH |
| SHA-256 | 2A8DA2F8D23E0CD3B5871ECFB0F42276CA73230667F474EEDE71C5EE32CC3EC6 |
| SPKI SHA-256 | 244803CFA35953385D06657AC4E5AB4F2BC0405277BE662ADB905E1498B1DEFD |
| Valid from | 2013-03-27 |
| Expires | 2036-03-27 |
| Key | RSA 4096 |
| Signature algorithm | sha512WithRSAEncryption |
| Serial number | 5152C58C |
| SHA-1 (Windows thumbprint) | 66F2DCFB3F814DDEE9B3206F11DEFE1BFBDFE132 |

## 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, Document Signing, Encrypting File System, Secure Email, Time Stamping; Not-before cutoff: 2026-09-15 (Code Signing, Secure Email) |

The CCADB lists no EV policy OID for Thailand National Root Certification Authority - G1.

## Intermediate CAs issued by this root

The CCADB lists 3 intermediate CA certificates signed directly by Thailand National Root Certification Authority - G1: 2 currently valid, 0 expired and 1 revoked (revoked includes those whose parent was revoked).

| Intermediate | Operated by | Expires | Status | SHA-256 |
|---|---|---|---|---|
| INET CA - G1 | Internet Thailand Public Company Limited | 2034-11-25 | Valid | DABF2E406C3DA1FE15166596E9029FADB1C3DFF59670D8AC5BFB6345198BC1AA |
| Thai Digital ID CA G3 | Thai Digital ID Company Limited | 2034-08-19 | Valid | 981D016EB85502B6DE8670598B2DD7A78525A391471F55542EEA2A27D812E4BF |
| Thai Digital ID CA G2 | Thai Digital ID Company Limited | 2033-09-24 | Revoked | 1BB53B227925EDF87192894B13C40AB5FD5AFFA44E92B7663A1D431D32867B81 |

## Cross-signed versions

No certificate in the CCADB has the same subject and public key as Thailand National Root Certification Authority - G1 with a different issuer, so a client has to carry Thailand National Root Certification Authority - G1 itself in its root store to trust it.


## What happens when it expires

Thailand National Root Certification Authority - G1 is valid until 2036-03-27, about 9.4 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 Thailand National Root Certification Authority - G1 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 Thailand National Root Certification Authority - G1 expire?**

On 2036-03-27, about 9.4 years after the 2026-11-10 data snapshot.

**How many intermediate certificates has Thailand National Root Certification Authority - G1 issued?**

The CCADB lists 3: 2 valid, 0 expired and 1 revoked. The newest valid one is INET CA - G1, valid until 2034-11-25.

**Is Thailand National Root Certification Authority - G1 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).