eCoinomic - Blockchain is a distributed database system that acts as an “open ledger”
Blockchain is a distributed database system that acts as an “open ledger” to store and manage transactions. Each record in the database is called a block and contains details such as the transaction timestamp as well as a link to the previous block. This makes it impossible for anyone to alter information about the records retrospectively. Also, due to the fact that the same transaction is recorded over multiple, distributed database systems, the technology is secure by design.