You Don't Need a Ledger
Kristof Jannes, Bert Lagaisse, Wouter Joosen · 2019
Centralized systems relying on a trusted third party are being replaced by decentralized systems using proof-of-work blockchains to reach consensus between multiple mistrusting parties. Due to the high energy usage of such systems, many solutions using a Byzantine fault-tolerant algorithm to reach consensus have emerged. While those systems solve the energy and safety concerns of proof-of-work blockchains, they still require a peer to store the full ledger and need a complex backend infrastructure to get started.