An automatized Identity and Access Management system for IoT combining Self-Sovereign Identity and smart contracts

群体合约：一种多主权代理共识机制

Swarm Contract: A Multi-Sovereign Agent Consensus Mechanism

本文提出群体合约（Swarm）机制，通过多个主权代理在可信执行环境中以链下多代理共识替代单一链上合约，并以链下拍卖万枚NFT为例验证其可行性，旨在扩展去信任化去中心化方案在DAO治理、多模态数据处理和跨链互操作中的应用。

A Decentralised Real Estate Transfer Verification Based on Self-Sovereign Identity and Smart Contracts

Since its first introduction in late 90s, the use of marketplaces has continued to grow, today virtually everything from physical assets to services can be purchased on digital marketplaces, real estate is not an exception. Some marketplaces allow acclaimed asset owners to advertise their products, to which the services gets commission/percentage from proceeds of sale/lease. Despite the success recorded in the use of the marketplaces, they are not without limitations which include identity and property fraud, impersonation and the use of centralised technology with trusted parties that are pro…

主权保证边界：面向智能体基础设施的证书绑定准入机制

Sovereign Assurance Boundary: Certificate-Bound Admission for Agentic Infrastructure

针对智能体基础设施中非确定性推理系统对生产资源的高风险操作，提出主权保证边界（SAB），通过证书绑定的运行时准入层，将代理提案编译为执行合约并绑定加密证据，实现可验证、可撤销的授权控制。

Blockchains and Self-Sovereign Identities Applied to Healthcare Solutions: A Systematic Review

Self-Sovereign Identity (SSI), a Blockchain-based technology for digital identity management, is a promising concept for handling health data. It could represent a step forward in empowering users, granting them control over their data. This work conducts a systematic literature review to investigate state-of-the-art measures based on SSI and Blockchain technologies for dealing with electronic health records (EHRs), identifying gaps, and determining the key questions for future research. As a result, this review shows a growing interest in Blockchain methods to handle EHRs, but few works consi…

NSSIA: A New Self-Sovereign Identity Scheme with Accountability

Self-Sovereign Identity (SSI) is a new distributed method for identity management, commonly used to address the problem that users are lack of control over their identities. However, the excessive pursuit of self-sovereignty in the most existing SSI schemes hinders sanctions against attackers. To deal with the malicious behavior, a few SSI schemes introduce accountability mechanisms, but they sacrifice users' privacy. What's more, the digital identities (static strings or updatable chains) in the existing SSI schemes are as inputs to a third-party executable program (mobile app, smart contract…

Smart Contract Federated Identity Management without Third Party Authentication Services

Federated identity management enables users to access multiple systems using a single login credential. However, to achieve this a complex privacy compromising authentication has to occur between the user, relying party (RP) (e.g., a business), and a credential service provider (CSP) that performs the authentication. In this work, we use a smart contract on a blockchain to enable an architecture where authentication no longer involves the CSP. Authentication is performed solely through user to RP communications (eliminating fees and enhancing privacy). No third party needs to be contacted, not…