ODN is the abbreviation of 'OriginTrail Decentralized Network'. This is an open-source and permissionless network that relies on an off-chain technology stack consisting of several inter-related layers. It is a decentralised network of data providers, data creators, data holders, and data viewers. The glue between all entities is the ERC-20 based Trace Token (TRAC). This is used as a collateral stake to keep data holders honest and for payment