More Efficient Stealth Address Protocol

• URL: http://arxiv.org/abs/2504.06744v1
• Date: Wed, 09 Apr 2025 10:01:24 GMT
• Title: More Efficient Stealth Address Protocol
• Authors: Marija Mikic, Mihajlo Srbakoski, Strahinja Praska,
• Abstract summary: The Stealth Address Protocol (SAP) provides recipient anonymity by generating unlinkable stealth addresses.<n>Existing SAPs, such as the Dual-Key Stealth Address Protocol and the Curvy Protocol, have shown significant improvements in efficiency, but remain vulnerable to quantum attacks.<n>We present a novel hybrid SAP that combines the Curvy protocol with the computational advantages of the Module-LWE technique.
• Score: 0.21847754147782888
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The integration of privacy-preserving transactions into public blockchains such as Ethereum remains a major challenge. The Stealth Address Protocol (SAP) provides recipient anonymity by generating unlinkable stealth addresses. Existing SAPs, such as the Dual-Key Stealth Address Protocol and the Curvy Protocol, have shown significant improvements in efficiency, but remain vulnerable to quantum attacks. Post-quantum SAPs based on lattice-based cryptography, such as the Module-LWE SAP, on the other hand, offer quantum resistance while achieving better performance. In this paper, we present a novel hybrid SAP that combines the Curvy protocol with the computational advantages of the Module-LWE technique while remaining Ethereum-friendly. In contrast to full post-quantum solutions, our approach does not provide quantum security, but achieves a significant speedup in scanning the ephemeral public key registry, about three times faster than the Curvy protocol. We present a detailed cryptographic construction of our protocol and compare its performance with existing solutions. Our results prove that this hybrid approach is the most efficient Ethereum-compatible SAP to date.

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