A Public Blockchain is an open protocol. This means that anyone have equal rights and can participate with the appropriate software and hardware. The ledger represents all transactions. It is also public and can be viewed by everyone .
The blocks of a Blockchain are distributed and the individual blocks are linked by the hash values. With this architecture every participant is permitted to execute and validate transactions or read the data . Popular Public Blockchains are for example Bitcoin or Ethereum .
 Plazibat, A, (2017): The Business Potential of Distributed Ledger Technology
 Heines, R. (2017): Blockchain Technology Applications: A Conceptual Framework from a Supply Chain Perspective