14,951 research outputs found
MOF-BC: A Memory Optimized and Flexible BlockChain for Large Scale Networks
BlockChain (BC) immutability ensures BC resilience against modification or
removal of the stored data. In large scale networks like the Internet of Things
(IoT), however, this feature significantly increases BC storage size and raises
privacy challenges. In this paper, we propose a Memory Optimized and Flexible
BC (MOF-BC) that enables the IoT users and service providers to remove or
summarize their transactions and age their data and to exercise the "right to
be forgotten". To increase privacy, a user may employ multiple keys for
different transactions. To allow for the removal of stored transactions, all
keys would need to be stored which complicates key management and storage.
MOF-BC introduces the notion of a Generator Verifier (GV) which is a signed
hash of a Generator Verifier Secret (GVS). The GV changes for each transaction
to provide privacy yet is signed by a unique key, thus minimizing the
information that needs to be stored. A flexible transaction fee model and a
reward mechanism is proposed to incentivize users to participate in optimizing
memory consumption. Qualitative security and privacy analysis demonstrates that
MOF-BC is resilient against several security attacks. Evaluation results show
that MOF-BC decreases BC memory consumption by up to 25\% and the user cost by
more than two orders of magnitude compared to conventional BC instantiations
Lightweight Blockchain Framework for Location-aware Peer-to-Peer Energy Trading
Peer-to-Peer (P2P) energy trading can facilitate integration of a large
number of small-scale producers and consumers into energy markets.
Decentralized management of these new market participants is challenging in
terms of market settlement, participant reputation and consideration of grid
constraints. This paper proposes a blockchain-enabled framework for P2P energy
trading among producer and consumer agents in a smart grid. A fully
decentralized market settlement mechanism is designed, which does not rely on a
centralized entity to settle the market and encourages producers and consumers
to negotiate on energy trading with their nearby agents truthfully. To this
end, the electrical distance of agents is considered in the pricing mechanism
to encourage agents to trade with their neighboring agents. In addition, a
reputation factor is considered for each agent, reflecting its past performance
in delivering the committed energy. Before starting the negotiation, agents
select their trading partners based on their preferences over the reputation
and proximity of the trading partners. An Anonymous Proof of Location (A-PoL)
algorithm is proposed that allows agents to prove their location without
revealing their real identity. The practicality of the proposed framework is
illustrated through several case studies, and its security and privacy are
analyzed in detail
UniquID: A Quest to Reconcile Identity Access Management and the Internet of Things
The Internet of Things (IoT) has caused a revolutionary paradigm shift in
computer networking. After decades of human-centered routines, where devices
were merely tools that enabled human beings to authenticate themselves and
perform activities, we are now dealing with a device-centered paradigm: the
devices themselves are actors, not just tools for people. Conventional identity
access management (IAM) frameworks were not designed to handle the challenges
of IoT. Trying to use traditional IAM systems to reconcile heterogeneous
devices and complex federations of online services (e.g., IoT sensors and cloud
computing solutions) adds a cumbersome architectural layer that can become hard
to maintain and act as a single point of failure. In this paper, we propose
UniquID, a blockchain-based solution that overcomes the need for centralized
IAM architectures while providing scalability and robustness. We also present
the experimental results of a proof-of-concept UniquID enrolment network, and
we discuss two different use-cases that show the considerable value of a
blockchain-based IAM.Comment: 15 pages, 10 figure
Peer-to-Peer EnergyTrade: A Distributed Private Energy Trading Platform
Blockchain is increasingly being used as a distributed, anonymous, trustless
framework for energy trading in smart grids. However, most of the existing
solutions suffer from reliance on Trusted Third Parties (TTP), lack of privacy,
and traffic and processing overheads. In our previous work, we have proposed a
Secure Private Blockchain-based framework (SPB) for energy trading to address
the aforementioned challenges. In this paper, we present a proof-on-concept
implementation of SPB on the Ethereum private network to demonstrates SPB's
applicability for energy trading. We benchmark SPB's performance against the
relevant state-of-the-art. The implementation results demonstrate that SPB
incurs lower overheads and monetary cost for end users to trade energy compared
to existing solutions
Recommended from our members
FABRIC: A National-Scale Programmable Experimental Network Infrastructure
FABRIC is a unique national research infrastructure to enable cutting-edge and exploratory research at-scale in networking, cybersecurity, distributed computing and storage systems, machine learning, and science applications. It is an everywhere-programmable nationwide instrument comprised of novel extensible network elements equipped with large amounts of compute and storage, interconnected by high speed, dedicated optical links. It will connect a number of specialized testbeds for cloud research (NSF Cloud testbeds CloudLab and Chameleon), for research beyond 5G technologies (Platforms for Advanced Wireless Research or PAWR), as well as production high-performance computing facilities and science instruments to create a rich fabric for a wide variety of experimental activities
- …