Abstract: The disclosed technology provides for managing, authenticating, and authorizing data sharing between parties utilizing multi-party-computation (“MPC”). A method can include: receiving, by a server from a party B system, (i) a request to access first data of a party A system and (ii) second data of party B, sending, to the party systems, an authorization request to authorize the request, receiving, from the party systems, MPC shares associated with trusted third party processing of data, the MPC shares generated as part of a digital contract between the parties for combining the first and second data within an environment of the trusted third party, to which neither party has access, retrieving MPC authorization functions associated with the digital contract, determining whether the requested access is authorized based on the MPC shares and MPC authorization functions, and performing data processing operations using the first and second data in a secure environment.