Privacy-preserving auditable token payments in a permissioned blockchain system
Elli Androulaki, Jan L. Camenisch, Angelo De, Maria Dubovitskaya, Kaoutar Elkhiyaoui, Björn Tackmann · 2020
Token payment systems were the first application of blockchain technology and are still the most widely used one. Early implementations of such systems, like Bitcoin or Ethereum, provide virtually no privacy beyond basic pseudonymity: all transactions are written in plain to the blockchain, which makes them linkable and traceable.