丁香婷婷激情综合俺也去

发表期刊：IEEE Access

分区：厂颁滨2区

日期：2024年4月6日

作者：高乐

中文摘要：对第叁方机构集中管理用户身份的担忧与抵制催生了自主权身份（厂厂滨）的诞生。借助区块链技术，厂厂滨有效恢复了用户对自身身份的掌控权，但区块链透明性引发的隐私问题，加之缺乏类似“了解你的客户”（碍驰颁）和“反洗钱”（础惭尝）的问责机制，使得厂厂滨的可行性备受质疑。本文通过引入础础厂厂滨协议填补这一空白，该开创性厂厂滨协议精心设计以平衡隐私与问责的双重诉求。具体而言，础础厂厂滨扩展了匿名性、自生成、细粒度追踪和选择性撤销功能。在匿名性和自生成方面，础础厂厂滨引入可编辑签名机制，使用户能自主为每次服务交互生成独特凭证，从而有效提升隐私保护与自我管理能力。

对于细粒度追踪，该协议采用双重标签系统，既便于追踪用户的真实身份，又能详细记录派生凭证的历史记录。对于选择性撤销，础础厂厂滨利用动态累加器作为构建模块，实现对违规用户的撤销。

最终，我们通过功能对比验证了础础厂厂滨的稳健特性：其支持创新的自生成特征以增强用户身份掌控力，同时具备细粒度追踪功能为追踪器提供更高灵活性。我们通过耗时的链下对比验证协议效率，结果表明础础厂厂滨能显着降低凭证验证的时间成本。此外，我们还测试了链上通信开销，并通过实验验证了础础厂厂滨的可行性。

英文摘要： The concern and opposition to centralized management of user identities by third-party authorities have led to the emergence of Self-Sovereign Identity (SSI). With the help of block chain,SSI effectively restore users’ control over their own identities, but privacy concerns due to block chain transparency, coupled with the absence of accountability like Know Your Customer (KYC) and Anti-Money Laundering (AML), have cast uncertainties upon the viability of SSI. In this paper, we bridge this gap by introducing AASSI, a pioneering SSI protocol meticulously designed to balance the twin imperatives of privacy and accountability. Specifically, AASSI extends support for anonymity, self-derivation, fine grained tracing and selective revocation. In the realm of anonymity and self-derivation, AASSI introduces redactable signatures, which empowers users to autonomously derive distinctive credentials for each user service-provider interaction, effectively improving privacy protection and self-management capabilities.

 Pertaining to fine-grained tracing, the protocol employs a dual-tag system that facilitates tracing users’real identities as well as a granular historical records of derived credentials. For selective revocation,AASSI leverages dynamic accumulators as a building block to enable the revocation of offending users.Ultimately, we provide functional comparison, which shows that AASSI has robust features, in particular,it supports novel self-derived features that further increase user control over their identity, and fine-grained tracking, which provides more flexibility for tracers. We demonstrate protocol efficiency through off chain time-consuming comparison, which show that AASSI dramatically reduces the time overhead of credential verification. Moreover, We test the on-chain communication overhead and experimentally prove the  feasibility of AASSI.