# Atos TrustedRoot 2011 root certificate (Atos)

> Atos TrustedRoot 2011 is a root CA certificate operated by Atos (RSA 2048, valid until 2030-12-31, SHA-256 F356BEA2). As of the latest CCADB data it is trusted for TLS server authentication by 2 of 4 major root stores: Apple, Microsoft.

Source: https://ssl.sh/roots/atos-trustedroot-2011/
Last updated: 2026-11-10

Atos TrustedRoot 2011 is a root CA certificate operated by Atos (RSA 2048, valid until 2030-12-31, SHA-256 F356BEA2). As of the latest CCADB data it is trusted for TLS server authentication by 2 of 4 major root stores: Apple, Microsoft.

| Field | Value |
|---|---|
| CA owner | Atos |
| Subject | C=DE,O=Atos,CN=Atos TrustedRoot 2011 |
| SHA-256 | F356BEA244B7A91EB35D53CA9AD7864ACE018E2D35D5F8F96DDF68A6F41AA474 |
| SPKI SHA-256 | E5CA37BC7B6C361979BC6B123CA9A1DB019046D7FF5F57DFB854B19D10B0682F |
| Valid from | 2011-07-07 |
| Expires | 2030-12-31 |
| Key | RSA 2048 |
| Signature algorithm | sha256WithRSAEncryption |
| Serial number | 5C33CB622C5FB332 |
| SHA-1 (Windows thumbprint) | 2BB1F53E550C1DC5F1D4E6B76A464B550602AC21 |

## Root store status

| Root store | Status | Trusted for TLS | Distrust for TLS after | Details |
|---|---|---|---|---|
| Chrome | Removed | No | - | - |
| Mozilla | Included | No | - | Trust bits: Email; EV policy OIDs: not EV-enabled; First included in: NSS 3.16 / Firefox 29; Inclusion bug: #711366 |
| Apple | Included | Yes | - | Trust bits: serverAuth, clientAuth, emailProtection |
| Microsoft | Included | Yes | - | Trusted EKUs: Server Authentication, Client Authentication, Code Signing, Encrypting File System, IP Security Tunnel Termination, IP Security User, OCSP Signing, Secure Email, Time Stamping; Not-before cutoff: 2020-06-01 (OCSP Signing) |

The CCADB lists no EV policy OID for Atos TrustedRoot 2011.

## Intermediate CAs issued by this root

The CCADB lists 56 intermediate CA certificates signed directly by Atos TrustedRoot 2011: 18 currently valid, 7 expired and 31 revoked (revoked includes those whose parent was revoked).

| Intermediate | Operated by | Expires | Status | SHA-256 |
|---|---|---|---|---|
| Eviden TrustedRoot Client CA for Bull G2 2026 | Atos | 2030-12-31 | Valid | D4E8B47B03E37EAE9466D4C91E24C72589B6493DD1DB93D4EE6703E4DED0E74E |
| Eviden TrustedRoot Client CA for Wintershall Dea G2 2023 | Atos | 2030-12-31 | Valid | 48C46DA4E9A6490B3067CD79A2483E92777A41DA88C77BE5006D341CF90422A2 |
| Eviden TrustedRoot Mailgateway CA G2 2023 | Atos | 2030-12-31 | Valid | BA71F25B775BEAA94534142ACB958604D63D29847B038C48575DD41C270F9876 |
| Eviden TrustedRoot Client CA for Primetals 2023 | Atos | 2030-12-31 | Valid | FAA5865F955924828B4984B390086FC944CF359A56DDEF341D66CF88A83F1810 |
| Eviden TrustedRoot Client CA for NordLB 2023 | Atos | 2030-12-31 | Valid | F8A990A525EA9925E4967A5442E9721E4B8D414B001758C128427C0E6D3D2A49 |
| Eviden TrustedRoot Client CA for Paragon G2 2023 | Atos | 2030-06-26 | Valid | F2F2ED9E785F1D72B3BFF6DAD1E731FAF1251B0B22E4FB345CEED39FB4B68298 |
| Eviden TrustedRoot Client CA for Elopak 2023 | Atos | 2030-12-31 | Valid | AA17963ADF83409C92762A84FF5ECD4A74F39039F0D769173191CE0DE0215A86 |
| Eviden TrustedRoot Client CA for Atos 2023 | Atos | 2030-12-31 | Valid | 553C2BBAD2DFC79FDEB5DCEE5293DCA70A102E5D87EDDA806E424634E1FE306E |
| Eviden TrustedRoot Client CA for SPIE 2023 | Atos | 2030-12-31 | Valid | 2EAFDB0E7372B59D1C02C86D85B95196AD6B0F50E7814D2B9FDB201F6FA97D7D |
| Eviden TrustedRoot Client-CA G2 2023 | Atos | 2030-05-01 | Valid | CE8556B2E0E76EF602D44D8187F534E071677C6BF98E76563FE789A87BEBA709 |
| Atos TrustedRoot Client-CA for Elopak G2 2022 | Atos | 2030-07-10 | Valid | 079945DE25532CA107DD377C8C863663653E30219C7EB16866BE220542A2BEA9 |
| Atos TrustedRoot Client-CA for Primetals G2 2022 | Atos | 2030-05-02 | Valid | 2445879506C19F122716F5BAD351CB73415CDF6186E8741B34FA1C956A198B5E |
| Atos TrustedRoot Client-CA for Primetals 2022 | Atos | 2030-03-15 | Valid | 4F36C688E8F4409DAB5E8FF32E535C4937B2A73B9BD04855BC5D6528088CD1AF |
| Atos TrustedRoot CodeSign CA 2021 | Atos | 2030-04-12 | Valid | 0D3D8E182C24639A1B7E9A4C32D6DC49EF621ADFD6747E151E289DD08777E094 |
| Atos TrustedRoot Timestamp CA 2020 | Atos | 2030-09-13 | Valid | BF7EADE06B2F845ACE7BD690BC3476D4F9EB770C63F2893A35CD52EFEAED6EA3 |
| Atos TrustedRoot Client-CA 2020 | Atos | 2030-07-05 | Valid | 5317DF82FB9A88993FA067D8352BC4195B84BBD0C698A1EDD7AF97C9DD90D879 |
| Atos TrustedRoot Mailgateway CA 2019 | Atos | 2029-05-05 | Valid | 6E81509376C93FBCE79472C843A568E883CB5D23ECEEA8299A5CBE9C57BCEE1C |
| Atos TrustedRoot Server-CA 2019 | Atos | 2029-03-25 | Valid | 08FD418B118853484FD1B066F1922A80F571D8FFF7268D598B086DF18B580AD8 |
| Atos TrustedRoot Client Issuing CA 2015 | Atos | 2025-08-30 | Expired | 40F47955BEA3EA726CADAC5D3FE61297FE7BEBAE5B0509E1EF7B29C838F49D20 |
| Atos TrustedRoot Issuing CA for WWE 2015 | Atos | 2025-05-04 | Expired | 74AFCEECE0731587B45C3CDA7BC210FC917502A323401E932E865BC3D797E7AB |

## Cross-signed versions

No certificate in the CCADB has the same subject and public key as Atos TrustedRoot 2011 with a different issuer, so a client has to carry Atos TrustedRoot 2011 itself in its root store to trust it.


## What happens when it expires

Atos TrustedRoot 2011 is valid until 2030-12-31, about 4.1 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 Atos TrustedRoot 2011 trusted by Chrome, Firefox, Safari and Windows?**

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

**When does Atos TrustedRoot 2011 expire?**

On 2030-12-31, about 4.1 years after the 2026-11-10 data snapshot.

**How many intermediate certificates has Atos TrustedRoot 2011 issued?**

The CCADB lists 56: 18 valid, 7 expired and 31 revoked. The newest valid one is Eviden TrustedRoot Client CA for Bull G2 2026, valid until 2030-12-31.

**Is Atos TrustedRoot 2011 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).