Hyperledger is an umbrella project of open source blockchains and related tools, started in December 2015 by the Linux Foundation, and has received contributions from IBM, Intel and SAP Ariba, to support the collaborative development of blockchain-based distributed ledgers.
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Early on there was some confusion that Hyperledger would develop its own bitcoin-type cryptocurrency, but Behlendorf has unreservedly stated that the Hyperledger Project itself will never build its own cryptocurrency.
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Hyperledger Fabric is a permissioned blockchain infrastructure, originally contributed by IBM and Digital Asset, providing a modular architecture with a delineation of roles between the nodes in the infrastructure, execution of Smart Contracts and configurable consensus and membership services.
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Hyperledger Fabric allows for use of different consensus algorithms, but the consensus algorithm that is most commonly used with the platform is Practical Byzantine Fault Tolerance.
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Hyperledger Caliper is a blockchain benchmark tool and one of the Hyperledger projects hosted by The Linux Foundation.
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Hyperledger Caliper allows users to measure the performance of a specific blockchain implementation with a set of predefined use cases.
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Hyperledger Cello is a blockchain module toolkit and one of the Hyperledger projects hosted by The Linux Foundation.
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Hyperledger Cello aims to bring the on-demand "as-a-service" deployment model to the blockchain ecosystem to reduce the effort required for creating, managing and terminating blockchains.
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Hyperledger Composer was a set of collaboration tools for building blockchain business networks that make it simple and fast for business owners and developers to create smart contracts and blockchain applications to solve business problems.
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Hyperledger Explorer is a blockchain module and one of the Hyperledger projects hosted by The Linux Foundation.
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Hyperledger Quilt is a business blockchain tool and one of the Hyperledger projects hosted by The Linux Foundation.
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Hyperledger Quilt offers interoperability between ledger systems by implementing the Interledger protocol, which is primarily a payments protocol and is designed to transfer value across distributed ledgers and non-distributed ledgers.
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Hyperledger Quilt was initially contributed by NTT Data and Ripple.
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