The Blog (Posts about s2opc)

S2OPC 1.7.3 release

Systerel — Mon, 08 Jun 2026 13:09:16 GMT

The S2OPC team is proud to announce the 1.7.3 release of S2OPC.

This is mainly a security release. It fixes two vulnerabilities related to certificate trust and revocation checking, and we strongly recommend all users to upgrade. It also brings a new feature completing the Cyclone library wrapper, along with several enhancements and bug fixes.

S2OPC 1.7.2 release

Systerel — Wed, 25 Mar 2026 14:14:36 GMT

The S2OPC team is proud to announce the 1.7.2 release of S2OPC.

This release introduces several improvements including:

Alarms and Conditions: first support of the OPC UA AlarmConditionType
Optional structure fields: support for OPC UA Unions and Structures with optional fields
Thread-safe dictionary: a new thread safe dictionary API
Session management: the server wrapper can now terminate sessions (except one)

S2OPC 1.7.1 release

Systerel — Tue, 17 Feb 2026 13:24:03 GMT

The S2OPC team is proud to announce the 1.7.1 release of S2OPC.

This is a maintenance release following the 1.7.0 version. It brings a few enhancements and a security-related bug fix that adds a check for a buffer over-read while verifying the signature of secure channel message chunks (see issue #1704).

Fuzzing tests

Cinthya Kouamou — Mon, 16 Feb 2026 11:00:18 GMT

Principle of fuzz testing. (Source: cybermatters.info)

Introduction

In the development of industrial software, it is common to manipulate complex binary protocols, specific data formats. These components are traditionally validated using unit tests, an effective approach to verify expected and well-defined behaviors.

S2OPC 1.7.0 release

Systerel — Tue, 20 Jan 2026 08:56:51 GMT

The S2OPC team is proud to announce the 1.7.0 release of S2OPC.

This release introduces several improvements including:

Security Audit: fires OPC UA events in case of cybersecurity related events
Role Permission: to assign permissions to roles rather than individual users, simplifying management and improving security
PubSub Extended Support: it is now available on Windows
History Read: adds the capacity for the server to store previous values of nodes
Node Management : completes the services to add and delete nodes run time
Performance Improvement: improves performance of write/add nodes operations
Zephyr 4.1 Support: compatible with the latest version of this real-time operating system

S2OPC 1.6.0 release

Systerel — Mon, 27 Jan 2025 08:56:51 GMT

The S2OPC team is proud to announce the 1.6.0 release of S2OPC.

This release introduces several improvements including:

OPC UA events management
Support of Zephyr revision 3.6 (see issue #1464)
Support of PikeOS revision 5.1 (thanks to our partner SYSGO) (see issue #1160)
Support of MbedTLS revision 3 (see issue #1446)
A complete rework of our Python binding PyS2OPC (see issue #1251)

As this revision contains important cybersecurity fixes, we advice all our customers to switch to this new revision.

S2OPC 1.5.1 release

Systerel — Thu, 13 Jun 2024 08:56:51 GMT

The S2OPC team is proud to announce the 1.5.1 release of S2OPC.

The main new features are the availability of a demo server implementing the Push Management model according to the OPC UA part 12 (see issue #1247), and a hook to re-evaluate X509IdentityToken certificates for all sessions (on server side, see issue #1370).

First Level Security Certification (CSPN): The S2OPC Case Study

Vincent Pouzol, Vincent Lacroix — Sun, 12 May 2024 09:00:59 GMT

In October 2023, Systerel received the Security Visa from the French National Cybersecurity Agency (ANSSI) for the CSPN (First Level Security Certification) of its product: S2OPC. This achievement gives us the opportunity to focus on what the CSPN is and to provide feedback on the certification process.

S2OPC 1.5.0 release

Systerel — Tue, 06 Feb 2024 08:56:51 GMT

The S2OPC team is proud to announce the 1.5.0 release of S2OPC.

Securing IIoT communications using OPC UA PubSub and Trusted Platform Modules

Olivier Gilles, Daniel Gracia-Perez, Pierre-Antoine Brameret, Vincent Lacroix — Thu, 05 Jan 2023 11:23:15 GMT

In the Industry 4.0 context, data are a valuable asset that must be protected. OPC UA PubSub enables secure and interoperable solutions, but authentication of IIoT devices remains a sensitive issue. This article presents a novel approach based on open source software, using a Trusted Platform Module to protect secrets on devices, and evaluate the security level on a predictive maintenance use case.