Refine
Year of publication
- 2021 (1)
Document Type
Conference Type
- Konferenzartikel (1)
Language
- English (1)
Has Fulltext
- no (1)
Is part of the Bibliography
- yes (1)
Institute
- ivESK - Institut für verlässliche Embedded Systems und Kommunikationselektronik (1) (remove)
Open Access
- Closed Access (1)
It seems to be a widespread impression that the use of strong cryptography inevitably imposes a prohibitive burden on industrial communication systems, at least inasmuch as real-time requirements in cyclic fieldbus communications are concerned. AES-GCM is a leading cryptographic algorithm for authenticated encryption, which protects data against disclosure and manipulations. We study the use of both hardware and software-based implementations of AES-GCM. By simulations as well as measurements on an FPGA-based prototype setup we gain and substantiate an important insight: for devices with a 100 Mbps full-duplex link, a single low-footprint AES-GCM hardware engine can deterministically cope with the worst-case computational load, i.e., even if the device maintains a maximum number of cyclic communication relations with individual cryptographic keys. Our results show that hardware support for AES-GCM in industrial fieldbus components may actually be very lightweight.