Why Blockchain?

Leveraging blockchain technology allows us to do two things that are integral to the success of the framework: offer participants a level of trust and security and reliably execute an incentive-based system to encourage participants to contribute data that will help improve a model’s performance.

With current web services, even if code is open source, people can’t be 100 percent sure of what they’re interacting with, and running the models generally requires specialized cloud services. In our solution, we put these public models into smart contracts, code on a blockchain that helps ensure the specifications of agreed upon terms are upheld. In our framework, models can be updated on-chain, meaning within the blockchain environment, for a small transaction fee or used for inference off-chain, locally on the individual’s device, with no transaction costs.

Smart contracts are unmodifiable and evaluated by many machines, helping to ensure the model does what it specifies it will do. The immutable nature and permanent record of smart contracts also allows us to reliably compute and deliver rewards for good data contributions. Trust is important when processing payments, especially in a system like ours that seeks to encourage positive participation via incentives (more to come on that later). Additionally, blockchains such as Ethereum have thousands of decentralized machines all over the world, making it less likely a smart contract will become completely unavailable or taken offline.