Data privacy management, cryptocurrencies and blockchain technology ESORICS 2020 International Workshops, DPM 2020 and CBT 2020, Guildford, UK, September 17–18, 2020, revised selected papers - Garcia-Alfaro, Joaquin; Navarro-Arribas, Guillermo; Herrera-Joancomarti, Jordi (Springer, 2020)