Blockchain from the code up.

The story of a technology that is changing the world.

October 2008 It all started with Satoshi Nakamoto and his paper Bitcoin: A Peer-to-Peer Electronic Cash System

which addressed a key problem in electronic commerce:

A purely peer-to-peer version of electronic cash would allow online payments to be sent directly 
from one party to another without going through a financial institution. 

Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party 
is still required to prevent double-spending.

We propose a solution to the double-spending problem using a peer-to-peer network.

BitCoin and Blockchain

Assets over cryptocurrency
Identity over anonymity
Selective endorsement (consensus) over proof of work

Blockchain Use cases

Blockchain and Hyperledger

Hyperledger, an open source collaborative effort to advance cross-industry blockchain technologies, 
is hosted by The Linux Foundation®. 

IBM provides blockchain solutions and services leveraging Hyperledger technologies, 
including Hyperledger Fabric and Hyperledger Composer.