Substratum (SUB) is an open-source network that allows anyone to allocate spare computing resources to support the foundation of the decentralized web. Its vision is to 'make the internet a free and fair place for the entire world'. The Substratum Network is a worldwide collection of nodes that uses cryptography to deliver secure content globally without the need for VPNs or Tor. Anyone who runs a Substratum Node are rewarded with SUB each time they serve content.