• Dr. Vijaya Kumar A V
• Vignesh K R

Blockchain is a ledger that stores the history of transactions in a distributed manner so that multiple entities can store the data at multiple locations. This results in each user having a copy of the entire history of transactions. If a change is made to one entity, it must be reflected in the entire network. Every update to the database is a batch of transactions grouped into blocks. Every block is an update and a chain of blocks is history. Each block is built off or chained to the previous block, using hash functions on the previous block. This makes the Blockchain tamper evident and also reduces the strain on the network.

Blockchain, Linked List, Merkle Tree.

"The Evolution Of Overwriting Hashing Technique In Blockchain ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 4, page no.c267-c272, April-2022, Available :http://www.jetir.org/papers/JETIR2204237.pdf

"The Evolution Of Overwriting Hashing Technique In Blockchain ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 4, page no. ppc267-c272, April-2022, Available at : http://www.jetir.org/papers/JETIR2204237.pdf