Scalability in Blockchain

Blockchain Technology is considered a nondestructive way to record changes in ledgers or database. The best part of BCT is the recording of data over a decentralized system that establishes trust in the system among all nodes where ledger copies are stored thus allowing no data tampering to occur at all. Lately the technology has suffered challenges as the number of participants using the technology is increasing. This work is a novel study of scalability issues in blockchain technology focusing healthcare sector as a use case. The paper proposes solutions using smart contracts in hierarchical models.