Blockchain is a mechanism for the sequential development of logs (or blocks) that are interconnected and secured by encryption. Each log block will contain a hash code that reflects the data of the block before it, so that blockchain becomes a secure technology.

To visualize a blockchain like an accounting diary in digital, it is possible to actually execute transactions between two partners effectively. Blockchain is resistant to data changes when a blockchain chain is managed by a decentralized network, and when data has been written to a block it can not be changed without making a change. adjacent blocks. In other words, any data change requires the consent of the majority of the network.