In traditional centralized internet services, third parties authenticate the transactions of the users. An important property of decentralized blockchain networks is the unrestricted and secured access to the private keys of users, which may often be threatened for several reasons. One considerable problem in systems based on blockchain technology is when users lose access to their keys due to, e.g., a broken or lost device. This paper, firstly, introduces an implementation that generates and maintains the private key in an Intel Software Guard Extension (SGX) enclave. The implementation allows using the private key in a process isolated from all other processes running on the same system. Secondly, the paper provides a method that enables the secure storage and recovery of a back-up key to and from an external repository, using an end-to-end secure connection. One proposed application, with which this technology could be exploited, is the social wallet.

This paper describes a work in progress for a proof of concept which visualizes network events of an industrial automation system in a 3D fish tank view. It aims to enable an automation operator, who most likely is a non-network-expert, to spot anomalies in network traffic and also to memorise past seen anomalies more easily. The developed solution builds upon three components: a Snort event-log forwarder, a database and the 3D fish tank to visualize the events. Different kind of fishes were chosen to present network nodes, and how they move in the fish tank describes the event. Visualization system was implemented using the Unity game engine. As this is still a work in progress, more development is needed; especially adding functionality to visualize normal network traffic besides Snort events is crucial. However, the first version showed interest among people, as this differs from traditional network event visualizations.