A Transaction-Level Model for Blockchain Privacy

ePrint Report: A Transaction-Level Model for Blockchain Privacy

François-Xavier Wicht, Zhipeng Wang, Duc V. Le, Christian Cachin

Considerable work explores blockchain privacy notions. Yet, it usually employs entirely different models and notations, complicating potential comparisons. In this work, we use the Transaction Directed Acyclic Graph (TDAG) and extend it to capture blockchain privacy notions (PDAG). We give consistent definitions for untraceability and unlinkability. Moreover, we specify conditions on a blockchain system to achieve each aforementioned privacy notion. Thus, we can …

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