This article is based on a guest lecture delivered at the Technical University of Denmark.

I’m an IoT researcher with more than 10 years of experience in low-power wireless networks and embedded systems. In the early days, often our main goal was to make things work at all. Security was an afterthought; besides the fact that many of the first uses of IoT were in “toy” applications, few people were even aware of the existence of these low-power wireless sensor networks, and fewer still had the means to attack them. …

There are few openly available quantitative results about IOTA. Motivated by this fact, we experimented with IOTA on two different IoT devices and two modern desktop and server computers. We found that despite the theoretical scalability of the Tangle, the actual IOTA protocol has relatively high energy consumption. The Proof-of-Work and transaction signing operations are computationally complex relative to the limited capabilities of many IoT devices and and may be impractical on energy-limited / battery-powered devices.

Note: this article uses results from the research paper Distributed Ledger Technology and the Internet of Things: A Feasibility Study, presented in the 1st Workshop on Blockchain-enabled Networked Sensor Systems (BlockSys).

Right now, the cryptocurrency market is down from its all-time high, and some of its newly attracted investors and enthusiasts risk losing their interest in the technology. It’s a good time to take a step back and reexamine the fundamentals. While it’s not possible to say which way the market is going to go from here, one thing is for sure — cryptocurrencies are here to stay. Here’s why.

1. Global scale cooperation without trust


Atis Elsts

Internet of Things researcher and software developer, PhD Computer Science.

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