Private Proof-of-Stake Blockchains using Differentially-private Stake Distortion

ePrint Report: Private Proof-of-Stake Blockchains using Differentially-private Stake Distortion

Chenghong Wang, David Pujo, Kartik Nayak, Ashwin Machanavajjhala

Safety, liveness, and privacy are three critical properties for any private proof-of-stake (PoS) blockchain. However, prior work (SP'21) has shown that to obtain safety and liveness, a PoS blockchain must in theory forgo privacy. Specifically, to ensure safety and liveness, PoS blockchains elect parties based on stake proportion, potentially exposing a party's stake even with private transaction processing. In this work, we make …

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