Blockchain and Blackboard Technology

Abstract Blockchain is transaction process which minimize transaction and data items of data sets that are encrypted transferred data items with secure data It is peer to peer technology The Blockchain is transaction flow or series of transactions Blackboard technology is used transaction store and retrieve independently In This paper Blockchain and blackboard technology is combined for transaction processing The communication cost and retriall cost will be reduced using Blockchain and Blackboard technolog

Tree-Chain: A Fast Lightweight Consensus Algorithm for IoT Applications

Blockchain has received tremendous attention in non-monetary applications including the Internet of Things (IoT) due to its salient features including decentralization, security, auditability, and anonymity. Most conventional blockchains rely on computationally expensive consensus algorithms, have limited throughput, and high transaction delays. In this paper, we propose tree-chain a scalable fast blockchain instantiation that introduces two levels of randomization among the validators: i) transaction level where the validator of each transaction is selected randomly based on the most significant characters of the hash function output (known as consensus code), and ii) blockchain level where validator is randomly allocated to a particular consensus code based on the hash of their public key. Tree-chain introduces parallel chain branches where each validator commits the corresponding transactions in a unique ledger. Implementation results show that tree-chain is runnable on low resource devices and incurs low processing overhead, achieving near real-time transaction settlement