3 research outputs found
Efficient Attribute-Based Smart Contract Access Control Enhanced by Reputation Assessment
Blockchain's immutability can resist unauthorized changes of ledgers, thus it
can be used as a trust enhancement mechanism to a shared system. Indeed,
blockchain has been considered to solve the security and privacy issues of the
Internet of Things (IoT). In this regard, most researches currently focus on
the realization of various access control models and architectures, and are
working towards making full use of the blockchain to secure IoT systems. It is
worth noting that there has been an increasingly heavy pressure on the
blockchain storage caused by dealing with massive IoT data and handling
malicious access behaviors in the system, and not many countermeasures have
been seen to curb the increase. However, this problem has not been paid enough
attention. In this paper, we implement an attribute-based access control scheme
using smart contracts in Quorum blockchain. It provides basic access control
functions and conserves storage by reducing the number of smart contracts. In
addition, a reputation-based technique is introduced to cope with malicious
behaviors. Certain illegal transactions can be blocked by the credit-assessment
algorithm, which deters possibly malicious nodes and gives more chance to
well-behaved nodes. The feasibility of our proposed scheme is demonstrated by
doing experiment on a testbed and conducting a case study. Finally, the system
performance is assessed based on experimental measurement
Blockchain Driven Access Control Mechanisms, Models and Frameworks: A Systematic Literature Review
Access control or authorization is referred to as the confinement of specific actions of an entity, thereby allowing them to be performed as per certain rules. Blockchain-driven access control mechanisms gained considerable attention directly after applications beyond the premise of cryptocurrency were found. However, there are no systematic efforts to analyze existing empirical evidence. To this end, we aim to synthesize litera- ture to understand the state-of-the-art blockchain driven access control mechanisms with respect to underlying platforms, utilized blockchain properties, nature of the mod- els and associated testbeds and tools. We conducted the review in a systematic way. Meta analysis and thematic synthesis were performed on the findings from relevant primary studies, in order to answer the framed research questions in perspective. We identified 76 relevant primary studies that passed the quality assessment. The problems targeted by relevant studies were single point of failure, security, and privacy, etc. The meta-analysis of the primary studies suggests the use of different blockchain platforms along with several application domains where different blockchain proprieties were utilized.
In this paper, we present a systematic literature review of blockchain driven access control systems. In hindsight, we present a taxonomy of blockchain-driven access control systems to better understand the immense implications of this field spanning various application domain