An Anonymous yet Accountable Contract Wallet System using Account Abstraction
Kota Chin, Keita Emura, Kazumasa Omote

TL;DR
This paper introduces a contract wallet system that balances user anonymity with accountability by combining account abstraction, accountable ring signatures, and traditional signatures, enhancing privacy and responsibility in blockchain transactions.
Contribution
It proposes a novel anonymous yet accountable contract wallet system utilizing accountable ring signatures alongside account abstraction, enabling both privacy and accountability in blockchain operations.
Findings
System provides transaction issuer anonymity.
Issuer can prove their involvement in transactions.
Implementation demonstrated on zkSync platform.
Abstract
Account abstraction allows a contract wallet to initiate transaction execution. Thus, account abstraction is useful for preserving the privacy of externally owned accounts (EOAs) because it can remove a transaction issued from an EOA to the contract wallet and hides who issued the transaction by additionally employing anonymous authentication procedures such as ring signatures. However, unconditional anonymity is undesirable in practice because it prevents to reveal who is accountable for a problem when it arises. Thus, maintaining a balancing between anonymity and accountability is important. In this paper, we propose an anonymous yet accountable contract wallet system. In addition to account abstraction, the proposed system also utilizes accountable ring signatures (Bootle et al., ESORICS 2015). The proposed system provides (1) anonymity of a transaction issuer that hides who agreed…
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Taxonomy
TopicsCryptography and Data Security · Blockchain Technology Applications and Security · Cloud Data Security Solutions
