Services and extensions for open-source TLS test tool

TLS Services

Secure compliance with technical guidelines

IT products and systems intended for use in security-critical fields of application must meet the highest security requirements. These requirements are specified by the Technical Guidelines (TR) of the Federal Office for Information Security (BSI). The use of the encryption standard TLS (Transport Layer Security) is also specified in detail in the various application-specific TRs of the BSI.

But how can the TLS conformity of a device and its software be tested efficiently and effectively? And how can the correct application of TLS already be ensured during the development of a new solution?

TLS Services by achelos

The open-source TLS test tool "TaSK" of the German Federal Office for Information Security (BSI) tests Transport Layer Security (TLS) configurations according to the test specification TR 03116-TS.

achelos developed the TaSK framework on behalf of the BSI and offers a comprehensive package of support and extensions around the BSI solution. Manufacturers and test centres can thus test the security and TLS conformity of software efficiently and flexibly.

Tailor-made professional security assessment

Fit for IT security with flexible test tool

With the TaSK Framework, you have a powerful and flexible test tool at your disposal with which you can test your devices and software for relevant safety requirements in a cost-effective and efficient manner.

In combination with the achelos services packages and extensions, you also benefit from optimised usability and first-class support when testing your individual IT security requirements.


The TLS test tool "TaSK" is available free of charge and is provided as an open-source solution under the EUPL (European Union Public Licence). The Linux-based solution enables the complete, automated testing of all requirements from the BSI Technical Guidelines for TLS Server, TLS Client, eID Server, eID Clients, e-mail servers and smart meter gateways.

Transparent and flexible

The open-source business model offers complete transparency of the test implementation and the possibility to make your own adjustments. Via the REST interface, the test suite can be conveniently integrated into your own development environment and existing test systems. In addition, the open-source version provides a basic reporting and an audit-proof documentation function to ensure the traceability of the test implementation.

360° Service

On top of the open-source solution, achelos offers a comprehensive service package of support and extensions. Starting with standard support, through individual adaptations, to taking over test execution and the operation of a publicly accessible test platform, various expansion stages are available to you.

Our support and service offering


In the Standard Edition, our offer includes basic access to the achelos expert team for questions and support, access to the ticket system and the provision of current releases of the BSI test suite from the Github repository.

The Enterprise Edition includes all services of the Standard Support and is complemented by extended access to the achelos expert team as well as continuous enhancements, such as a web GUI for simplified use of the test suite.


Consulting, TaaS and extensions

We are happy to support you in adapting the test suite to your individual requirements. For example, further segment-specific test cases can be integrated, or additional components can be connected. The achelos team ensures that your individual solution also fulfils all BSI requirements.

Benefit from our many years of expertise in development, testing and certification support! If you wish, we can take over the complete test implementation for you or operate a publicly accessible test platform, including 8 x 5 accessibility.


Managed Services

In addition, achelos offers the setup and operation of a publicly accessible test platform based on the open-source solution. This service can be combined with either the Standard Support or the Enterprise Support.

Expansion stages of TLS Services by achelos


  • Free availability through open source
  • Flexible use and integration
  • High degree of automation
  • Audit-proof documentation
  • Individual expansion stages
  • 360° service
  • Professional test support
  • Testing as a service
  • Managed services

Your partner for IT security

As a recognised expert for IT security in critical infrastructures, achelos is the ideal partner for successfully implementing and testing the security requirements of software and devices in accordance with the technical guidelines of the BSI and relevant standards. We have many years of experience in testing TLS, also in Common Criteria procedures, and provide you with optimal and targeted support.

Fit for IT security with achelos!

Heinfried Cznottka

Director Security Solutions


+49 5251 14212-327