The TPBC 2021 workshop will take place from 19 May to 7 July 2021 as a series of online seminars. The tentative schedule is every Wednesday, starting around 17h CEST and running until about 19h CEST.  This year's workshop is organized by the Cryptography and Data Security Group at University Bern. You will find further details on the workshop website: http://tpbc2021.blockchain-workshop.net/