We use the internet everyday, traveling from one website to the next, but most of us don’t know what happens to our data as we sign in and out of different sites. Blockstack is a new decentralized Internet and developer platform for secure, server-less apps. Blockstack’s system would let you control your own personal data—for example, by revoking a site’s access to it. It eliminates the middlemen and puts the power of the web back into user's own hands. Blockstack’s vision is made possible by an identity system built to be independent of any one company, including the startup itself. It uses the digital ledger, or blockchain, underpinning the digital currency Bitcoin to track usernames and associated encryption keys that allow a person to control his or her data and identity. A collective of thousands of computers around the globe maintains the blockchain, and no one entity controls it.