Security and Privacy Challenges and Potential Solutions for DLT based IoT Systems

The use of distributed ledger technologies introduces new security and privacy challenges. These challenges are dependent on properties of the ledgers, such as transaction latency and throughput. Some use cases may be outright impossible to implement securely, or in a privacy-retaining manner. Consequently, it is important that these concerns are taken into account when distributed ledger technologies are evaluated and selected as building blocks for higher-level systems. In this paper, we illustrate these concerns through use case examples. We discuss the implications these concerns on the use of distributed ledgers within higher-level systems, such as in SOFIE, a DLT-based approach to securely and openly federate IoT systems.