Blockchain protocols

Discover key facts and figures about major blockchain protocols that are empowering transformations across industries.

A decentralized open-source digital currency.

Consensus	Proof of Work (PoW)
Public / Private / Permissioned	Public
Smart contracts	No
Transaction privacy	No
Transaction visibility	All participants have access to all entries ever recorded.
Transaction ordering	Topological ordering from the perspective of transaction outputs.

Fault tolerance

PoW is vulnerable to a “51% attack”. Whoever has 51 percent or more of the network’s computing power can manipulate the blockchain to their advantage.

Performance

Performance on public blockchains utilizing PoW are orders of magnitude less than permissioned or private blockchains running other consensus protocols.