RT Journal Article T1 Modeling Bitcoin plus Ethereum as an open system of systems of public blockchains to improve their resilience against intentional risk A1 Partida, Alberto A1 Gerassis Davite, Saki A1 Criado, Regino A1 Romance, Miguel A1 Giráldez Pérez, Eduardo A1 Taboada Castro, Javier K1 5306 Económica del Cambio Tecnológico K1 1203.04 Inteligencia Artificial K1 5307.16 Teoría Monetaria AB In this article, we model the two most market-capitalised public, open and permissionless blockchain implementations, Bitcoin (BTC) and Ethereum (ETH), as a System of Systems (SoS) of public blockchains. We study the concepts of blockchain, BTC, ETH, complex networks, SoS Engineering and intentional risk. We analyse BTC and ETH from an open SoS perspective through the main properties that seminal System of Systems Engineering (SoSE) references propose. This article demonstrates that these public blockchain implementations create networks that grow in complexity and connect with each other. We propose a methodology based on a complexity management lever such as SoSE to better understand public blockchains such as BTC and ETH and manage their evolution. Our ultimate objective is to improve the resilience of public blockchains against intentional risk: a key requirement for their mass adoption. We conclude with specific measures, based on this novel systems engineering approach, to effectively improve the resilience against intentional risk of the open SoS of public blockchains, composed of a non-inflationary money system, “sound money”, such as BTC, and of a world financial computer system, “a financial conduit”, such as ETH. The goal of this paper is to formulate a SoS that transfers digital value and aspires to position itself as a distributed alternative to the fiat currency-based financial system. PB Electronics SN 20799292 YR 2022 FD 2022-01-12 LK http://hdl.handle.net/11093/3257 UL http://hdl.handle.net/11093/3257 LA eng NO Electronics, 11(2): 241 (2022) DS Investigo RD 19-sep-2024