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arXiv 2607.04032cs.CR
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基于可信执行环境的网络中私有令牌转移的数据结构

Data Structures for Private Token Transfers in TEE-Based Networks

Solar Republic LLC(Solar Republic有限责任公司);University of Canterbury(坎特伯雷大学)

Blake Regalia, Benjamin Adams

AI总结:

研究基于可信执行环境的机密智能合约网络易受存储访问模式攻击问题,提出延迟写缓冲区和桶条目按位前缀树两种数据结构及私有通知系统,利用令牌转移特性实现隐私保护与性能平衡。

摘要:

基于可信执行环境(TEE)的机密智能合约网络虽有望实现隐私,但易受存储访问模式攻击,导致令牌转移中发送者和接收者被关联。本文引入延迟写缓冲区(DWB)和桶条目按位前缀树(BTBE)两种新数据结构解决此漏洞,并提出私有通知系统,利用令牌转移特性实现隐私保护与性能平衡。

英文摘要:

Trusted execution environment (TEE) based confidential smart contract networks promise privacy but remain vulnerable to storage access pattern attacks that can link senders and recipients in token transfers. When contracts update recipient balances during transfers, the unique storage keys accessed reveal transaction relationships even when data is encrypted. This paper introduces two novel data structures to address this vulnerability: the Delayed Write Buffer (DWB) and the Bitwise-Trie of Bucketed Entries (BTBE). The DWB delays recipient balance updates by buffering pending transfers and randomly settling entries, breaking the direct correlation between transfer execution and recipient storage access. The BTBE further enhances privacy by grouping addresses into constant-sized buckets, preventing flooding attacks and creating anonymity sets for balance queries. Additionally, we present a private notification system enabling real-time, privacy-preserving push notifications for confidential contracts. Our domain-specific approach leverages the unique characteristics of token transfers -- asymmetric balance updates and tolerance for delayed settlement -- to achieve practical performance with probabilistic anonymity guarantees.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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