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Software protection is not only relevant to PC software. There are also important reasons for protecting PLC software: machines and plants, and the know-how in embedded software in them, need to be protected against reverse engineering. It also allows new business models to be implemented and guarantees system integrity.

Has the Stuxnet incident made manufacturers and users more aware of the dangers posed by viruses etc. Users and machine designers are now more aware of the need for security in automation and embedded systems than they were before the Stuxnet incident. In the Symantec first warned about this worm which has many similarities to the Stuxnet worm.

At the same time, unauthorized manipulation is becoming more and more of a problem. An example: manufacturers of wind power plants are anxious to prevent operators from tuning their wind turbines to generate more energy than specified.

This will increase the wear and tear of parts still under guarantee which the manufacturer will then have to replace. Technical protection systems make it difficult to reverse engineer equipment, control systems and machines.

The embedded software is effectively protected if the program code is encrypted. The encryption key is securely stored in either a dongle or in software which then activates and ties the key to a specific device or control system. Protection against reverse engineering is achieved by storing the program code in the target system in encrypted format as this prevents a disassembler from statically analyzing it.

The manufacturer digitally signs the program code to prevent it from being manipulated or modified without permission. The protection mechanism on the target system only allows correctly signed program components to be loaded and executed. What is the situation at the moment? You only need to tick the relevant box to generate protected code from within the development environment.

The new security concept helps to stop valuable know-how from being copied or transferred to other control systems. The integrated user management, which protects access to projects or source code, effectively prevents third party manipulation of control systems. Up till now the CoDeSys development system only contained password protection. New in version 3. The deep level of integration in CoDeSys opens up new possibilities. Individual software components no longer have to be licensed immediately.

They can be enabled via the Internet or offline via a license file after the software has been distributed. The machine manufacturer can thus use Feature-on-Demand to individually sell the features of his machines, both before and after shipment.

For example he can offer a cheap starter model to compete with low cost foreign suppliers and a high-end one with lots of extras. Control system suppliers can sell a fixed number of licenses for target systems on a pay-per-use basis. The machine or plant engineer can then activate the licenses in his control systems as required.

The manufacturer can also use pay-per-use mechanisms to lease his machines and bill customers according to usage. This will ensure he gets paid! And last but not least, this method can also be used by the machine or plant engineer to protect his source code. He can choose which parts can be seen and modified by his customers the end user , and which parts appear as a black box i.

License management is integrated into the sales process i. The number appears in the parts lists of the ERP system. The key is available from 3S. Similar types of Security Keys are also available for the target platforms. They only cost a little more than normal industrial memory cards. It is the first supplier in the PLC industry to offer such a solution. A protection profile is a sort of criteria catalogue which can be used to objectively test which of our products offer protection from which attacks.

VxWorks has made Wind River one of the leading global suppliers of real time operating systems. Full integration into the Eclipse-based VxWorks Workbench development environment is under way. Safety standards and measures guarantee that machines and plants do not present a hazard to humans, the environment or property.

This can only be guaranteed though if the manipulation of safety-critical systems is made impossible. The appropriate security solutions protect the safety solutions against attacks from outside, for example against unauthorized execution of program code or unauthorized modifications. It is based on tried and tested CodeMeter technology. Because this technology is fully integrated into CoDeSys it only takes a few mouse clicks to activate the protection.

There is no need to familiarize oneself with the technology. How can automation systems be effectively protected against manipulation? How are all these functions or features managed? Are the security functions described above always available in CoDeSys? Beside the collaboration with 3S, are there similar cooperations with, for example, control system manufacturers?

Security is also a basic prerequisite for meeting safety requirements. What does this mean?

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Protecting PLC software using CoDeSys V3.5 and CodeMeter

Software protection is not only relevant to PC software. There are also important reasons for protecting PLC software: machines and plants, and the know-how in embedded software in them, need to be protected against reverse engineering. It also allows new business models to be implemented and guarantees system integrity. Has the Stuxnet incident made manufacturers and users more aware of the dangers posed by viruses etc. Users and machine designers are now more aware of the need for security in automation and embedded systems than they were before the Stuxnet incident.

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