Blockchain is a decentralised and distributed digital ledger that enables the secure sharing of information. Data, obviously, is stored in a database. Transactions are recorded in an account book called a ledger. One of the key features of blockchain is its ability to create trust and transparency without the need for intermediaries.

1. Types of Blockchain
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WHAT IS BLOCKCHAIN
Blockchain is a decentralised and distributed digital ledger that
enables the secure sharing of information. Data, obviously, is stored
in a database. Transactions are recorded in an account book called
a ledger. One of the key features of blockchain is its ability to create
trust and transparency without the need for intermediaries.
h t t p s : / / b l o c k c o d e r s . p r o /
Public Blockchain
Private blockchains are restricted to a
specific group or organisation. Private
blockchains operate on closed networks,
and tend to work well for private
businesses and organisations.
Private Blockchain Networks
Bitcoin and other cryptocurrencies
originated from public blockchains,
which also played a role in popularising
distributed ledger technology (DLT).
Consortium Blockchain
Consortium blockchains are a hybrid
between public and private blockchains.
They are governed by a group of
organisations or entities that have agreed
to participate in the network.
Permissioned Blockchain
Permissioned blockchains impose restrictions
on who can participate and perform certain
actions on the network. They are typically
used in enterprise settings where trust and
identity verification are crucial.
Sidechain
Side Chains are separate blockchains that
run alongside the main blockchain.
Sidechains can enhance scalability,
privacy, or provide unique functionalities.