Assessment and Treatment of Privacy Issues in Blockchain Systems. In Sung Y. Shin, Alessio Bechini, Hisham Haddad, Jiman Hong, John Kim, und Tei-Wei Kuo (Hrsg.), ACM SIGAPP Applied Computing Review, (22)3:5--24, ACM, September 2022. [PUMA: GDPR blockchain data_authentication data_purging decentralized immutable myown permission_control privacy_assessment privacy_control_environment privacy_filters tamper-proof]