Your partner for

Cyber Security in OT & IoT

With our cyber security solutions, we support companies in various industries as well as critical infrastructure with the secure operation of their systems, machines, products and solutions and navigate them through the jungle of standards and legislation. Our comprehensive services include consulting and assessment capabilities such as comprehensive penetration tests as well as a sophisticated training program with a wide range of individual learning formats!

Ein Whitepaper der Limes Security zum Thema Cyber Resilience Act liegt auf einem Tisch
Eine Frau und ein Mann stehen in einem Serverraum an einem Notebook
Ein Whitepaper der Limes Security zum Thema Cyber Resilience Act liegt auf einem Tisch
Eine Frau und ein Mann stehen in einem Serverraum an einem Notebook
OT Security Dreieck mit Security im Zentrum umgeben von den Faktoren Mensch, Prozess und Technologie

Defending what matters

In an increasingly interconnected world, industrial control systems (ICS), embedded software and OT infrastructures are a central component of many companies – and at the same time attractive targets for attackers. This is precisely where Limes Security comes in: we specialize in consulting, assessments and training in the field of industrial IT, OT and IoT security.

Our focus is on companies that develop or operate industrial solutions and products – from mechanical engineering to energy supply. With our expertise, we help to identify security risks at an early stage, minimize them in an efficient approach and build robust security structures for the long term.

We attach great importance to the efficient and effective interaction of technology, processes and the most important factor, people! Through this, holistic security strategies have a long-term and sustainable effect!

The Limes Security industry know-how

Our services

We secure your OT & IoT systems!
Holistic. Tried and tested. Future-proof.

Your holistic security strategy

We support your company in the analysis, evaluation and long-term secure operation of your OT & IT security, both strategically and technically.

Individual advice according to standards

Our consulting services include best practices, standard implementations such as IEC 62443 and consulting and implementation regarding CRA, NIS2, etc...

Penetration tests for maximum security from the outside

We use professionally conducted pentests to identify vulnerabilities in OT, IT, IoT and web systems and provide precise measures to eliminate them.

Ongoing minimization of risks

Our tests, assessments and consulting services help you to reduce security risks in the long term and avoid financial losses.

Practical training incl. Certification

The Limes Academy provides up-to-date cyber security know-how - from basic courses and expert knowledge to education courses leading to certification.

Customized training for your team

Whether e-learning, edutainment or In-house training - we are happy to adapt formats and content to your needs and strengthen your cyber security skills where they are needed.
Matthias Kratz von Ronal über die erfolgreiche Zusammenarbeit mit Limes Security

In 2019, Limes Security created a cybersecurity situation report for our production plants and developed technical and organizational recommendations tailored to our situation. They succeeded in creating a common understanding of the importance of cybersecurity in OT among the stakeholders involved - be it IT, process owners, plant managers or production employees. The high quality of the documents delivered should also be emphasized. We are convinced that we have found the right partner in Limes Security.

Matthias KratzHead of Manufacturing IT
Logo der Ronal Group, das für ein Statement für die Limes Security GmbH verwendet wird
Static Passwords, Hardcoded Keys, and Weak Cryptography: A Persistent Pattern in OT ProductsInsights

Static Passwords, Hardcoded Keys, and Weak Cryptography: A Persistent Pattern in OT Products

2. March 2026
Someone is typing on a notebook and apparently bypassing cyber security guidelines
Siemens Healthineers syngo.plaza – insecure password encryption vulnerabilityAdvisories

Siemens Healthineers syngo.plaza – insecure password encryption vulnerability

25. February 2026
Siemens Spectrum Power 4 – critical Vulnerabilities discovered in SCADA- and Energy Management SystemAdvisories

Siemens Spectrum Power 4 – critical Vulnerabilities discovered in SCADA- and Energy Management System

30. January 2026
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