Anonymity Analysis of the Umbra Stealth Address Scheme on Ethereum. (arXiv:2308.01703v1 [cs.CR])

Stealth addresses are a privacy-enhancing technology that provides recipient
anonymity on blockchains. In this work, we investigate the recipient anonymity
and unlinkability guarantees of Umbra, the most widely used implementation of
the stealth address scheme on Ethereum, and its three off-chain scalability
solutions, e.g., Arbitrum, Optimism, and Polygon. We define and evaluate four
heuristics to uncover the real recipients of stealth payments. We find that for
the majority of Umbra payments, it is straightforward to establish the
recipient, hence nullifying …

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