In general, each interface on an IT system not only provides the opportunity to use certain services of the IT system in an authorised manner, but also carries the risk of the IT system being accessed via these interfaces without authorisation.

Examples:

• If a user ID and the corresponding password are spied out, it is possible that the applications or IT systems protected with these security mechanisms are used in an unauthorised manner.
• Using inadequately secured remote maintenance accesses, hackers could access IT systems without authorisation.
• In the event of inadequately secured interfaces of active network components, it is conceivable that attackers would gain unauthorised access to the network component. If they also succeed in overcoming local security mechanisms, for example if they gained access to administrative authorisations, they could carry out all administration activities.
• Many IT systems provide interfaces for the use of exchangeable data storage devices, for example extended memory cards or USB storage media. When an IT system with the corresponding hardware and software is not supervised, there is a risk that large amounts of data could be read without authorisation or malware could be injected.

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