Zusammenfassung
The paper proposes a method based on different security-related factors to dynamically calculate the
validity period of digital certificates. Currently validity periods are most often defined statically without
scientific justification. This approach is not sufficient to objectively consider the actual need for security. Therefore the approach proposed in this paper considers relevant security criteria in order to calculate a meaningful validity period for digital certificates. This kind of security assessment can be executed
periodically in order to dynamically respond to changing conditions. Especially in the context of complex
systems and infrastructures that have an increased need for security, privacy and availability this issue is
highly relevant.
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