We were reviewing Storj network   This was initiated to address scalability and increase decentralization.  It is a distributed cloud storage network and removes the notion of a centralized third party storage provider.  It provides client side encryption which improves data security and data integrity is maintained with a proof of retrievability. It introduces a network first design where peers are autonomous agents and there is a protocol to enable them to negotiate contracts, transfer data, verify the integrity and availability of remote data and to reward with payments. It provides tools to enable all these interactions. It distributes the storage of a file as shards on this network and these shards are stored using a distributed hash table. The shards are themselves not stored in this hash table, rather a distributed network and messaging facilitates it with location information. Storj is built on Kademlia which provides the distributed hash table. Kademlia routes messages  through low latency paths and uses parallel asynchronous queries to avoid timeouts. It also reduces the number of configuration messages peers need to learn. The information spreads automatically  so the number of nodes can scale. Many of the important properties of Kademlia can be formally proven. Keys are opaque hash of some larger data and peers have node IDs. The key-value pairs are stored on the nodes with the ID close to the key where closeness is some notion. With the use of Kademlia, Storj focuses on the data instead. Whether the file is in tact is informed via challenge response interaction which is dubbed an audit. Merkle trees and proofs are used to verify integrity. This scheme may introduce some overhead so an extension is used that utilizes subsets of the data.