Covalent is a protocol that aims to make it possible for private models to utilize private data in a secure ecosystem. Data "owners" make their data available in return for financial reward and companies that need the data pay for access. Covalent makes sure that the data is encrypted to ensure maximum security and some people describe the platform as "an Amazon for Data".
See full review here: https://www.digitalassetdb.com/covalent ... -security/