GreenShield

Secures email and files with end-to-end encryption, signatures, automation, and post-quantum readiness.

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Overview

Future-proof communications with Post-Quantum Security

Eviden GreenShield secures sensitive emails and files beyond standard transport encryption with true end-to-end encryption and digital signatures. It is available in two dedicated editions: GreenShield VS for classified environments (approved for VS-NfD, NATO RESTRICTED, and EU RESTRICTED), and GreenShield Enterprise Suite for commercial enterprises and KRITIS operators utilizing S/MIME, OpenPGP, and automated certificate management. For next-generation security, the GreenShield PQC-ready extension future-proofs communications with quantum-resistant encryption powered by CRYSTALS-Dilithium and CRYSTALS-Kyber.

Key capabilities:

End-to-end encryption for email and files
Digital signatures for integrity and identity assurance
Variants for classified and enterprise communication
Automated workflow and certificate management
Post-quantum and composite cryptography extension.

Secure communications platform for encrypted email and files, with classified and enterprise variants and PQC extension capabilities.

Key features

What sets GreenShield apart

End-to-end protection for content

Secures identities with digital signatures and guarantees the integrity of every message. Unlike traditional transport encryption that only secures the transmission path, GreenShield encrypts the actual email and file content end-to-end to prevent unauthorized access.

Variant-based deployment model

Integrates as a native add-in across Microsoft Outlook, HCL Notes, Windows Explorer, and Ubuntu Nautilus. Supports flexible operational models including on-premises Domino setups, centralized S/MIME, or decentralized OpenPGP Web of Trust allowing seamless migration and multi-client use on a single device.

PQC-ready communication security

Future-proofs organizational security against emerging cryptographic threats. The GreenShield PQC-ready extension enhances the platform with composite signatures and quantum-resistant encryption powered by the CRYSTALS-Dilithium and CRYSTALS-Kyber algorithms.

Benefits

End-to-End protection for digital communications

Stronger protection for sensitive communication

Protects email and file content against unauthorized access and supports tamper-proof communication with verifiable signatures.

Better fit for regulated environments

Offers dedicated variants for classified public-sector use and secure enterprise communications in KRITIS and regulated industries.

More future-proof cryptographic investment

Prepares organizations for evolving cryptographic requirements through PQC-readiness and automated certificate management.

Why Eviden

Why choose GreenShield

Securing sensitive information

Seamless integration: No training required – employees continue working as usual in Microsoft Outlook or HCL Notes
Includes automated workflow and certificate management in the enterprise variant
Offers PQC extension with composite signatures and PQC encryption algorithms

Proof & Evidence

Certifications: GreenShield VS is BSI-approved for VS-NfD, NATO-restricted, and EU-restricted use
Compliance: GreenShield Enterprise Suite is compliance-ready for NIS2, ISO 27001, and DORA
Standards leadership: GreenShield Enterprise Suite supports S/MIME and OpenPGP

Architecture & Integration

Deployment model: Variant-based deployment with GreenShield VS, GreenShield Enterprise Suite, and GreenShield Extension PQC Ready

Key integrations:

Email and file security workflows
Certificate lifecycle management (CLM) in Enterprise Suite
Personal signature processes
Classified and enterprise communication environments

Standards supported: S/MIME, OpenPGP, CRYSTALS-Dilithium, CRYSTALS-Kyber

FAQ

Frequently asked questions

Eviden GreenShield is an end-to-end protection solution for emails and files that combines encryption and digital signatures to secure sensitive communications and data.

Transport encryption only protects data while it is being transmitted. End-to-end protection secures the actual content, ensuring confidentiality, integrity, and authenticity throughout its lifecycle.

Eviden offers GreenShield VS for government and classified communications, GreenShield Enterprise Suite for businesses, KRITIS operators, and regulated industries, and the GreenShield PQC Ready Extension, which adds post-quantum cryptography capabilities.

GreenShield VS is approved for VS-NfD, NATO RESTRICTED, and EU RESTRICTED environments. GreenShield Enterprise Suite supports S/MIME and OpenPGP, includes personal signatures and automated certificate lifecycle management (CLM), and helps organizations meet NIS2, ISO 27001, and DORA requirements. The PQC Ready Extension adds PQC encryption as well as CRYSTALS-Dilithium and CRYSTALS-Kyber-based signatures and encryption.

Solution

GreenShield

Encryption and digital signatures with VS-NfD approval

Convenient, secure, approved: GreenShield software protects emails and files using state-of-the-art cryptography. The German Federal Office for Information Security (BSI) has approved GreenShield for classified information up to the VS-NfD level.
Anyone who wants to protect their data must secure their digital communications. This applies in particular to public authorities and their industry partners, who are subject to the relevant confidentiality regulations. GreenShield offers user-friendly email and file encryption and is one of the few solutions of its kind to be approved for the confidentiality levels VS-NfD, NATO-restricted, and EU-restricted.
GreenShield can not only encrypt data, but also sign it. As an add-in for Microsoft Outlook (Windows), HCL Notes (Windows), Explorer (Windows), and Nautilus (Ubuntu), GreenShield integrates seamlessly into the user’s email program or operating system. In addition to S/MIME, GreenShield also supports OpenPGP, making it an ideal solution for exchanging data with a wide range of communication partners in an interoperable and secure manner.

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