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FAN-RSA: Fully Anonymous RSA-Based Stealth Address for Privacy-Preserving Transactions
- This paper presents Fully Anonymous Non-Interactive RSA-Based Stealth Address (FAN-RSA), a privacy-preserving transaction protocol that implements functionalities similar to “stealth addresses” proposed in Vitalik’s blog, enabling fully anonymised recipient address information.
- The work provides a proof of concept, a security proof, and an implementation with benchmarking on Ethereum.
- It supports three types of transactions: internal transfers, external transfers, and withdrawals.
- The results show that, using the circom-snarkjs ZK development tools, the circuit sizes for these transaction types are 1.7M, 800k, and 900k constraints, respectively.
- Under the Groth16 proving system, proof generation times are approximately 130s, 60s, and 70s, while the gas costs for on-chain transactions are 1.1M, 1.1M, and 270k, respectively.
- We call this protocol the Fully Anonymous Non-Interactive RSA-Based Stealth Address (FAN-RSA).
- The circuit size largely depends on the modular exponentiation template.
- This work presents a proof of concept for FAN-RSA, a privacy-preserving transfer mechanism implementing functionalities similar to “stealth addresses” based on RSA, along with an evaluation of its implementation on the EVM.
- However, the current work is limited to basic transaction types, namely external transfers, internal transfers, and withdrawals.
- Future research should expand this framework to encompass diverse DeFi transaction scenarios, providing high-level privacy tools for on-chain users with privacy requirements for their trading strategies.
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