Decentralized Storage
Sia is a new decentralized cloud storage platform aimed at giving users control of their data. Storage is pulled from a large network of hosts, each using Sia's blockchain to form storage contracts with clients. When uploading, clients erasure code their data into many encrypted pieces and upload each piece to a different host. The storage contracts on the blockchain ensure that the host will only get paid if they actually store the file (it's like a blockchain-based escrow). Out of the hundreds of hosts, only a fraction need to be online for the data to be recovered. Even in a network with many unreliable hosts, the data is safe.

Anybody with spare storage space can join the network as a host and get income from that storage. This openness allows Sia to tap into the mllions of terabytes of unused storage in the world. The encryption combined with the geographic diversity of hosts gives users both privacy and high reliability.

The long term goals of Sia involve leveraging a global network of hosts to improve upon existing cloud storage platforms. Our decentralized model allows for improvements in price, security, availability, latency, and throughput compared to traditional solutions. Read more →