New pending patent applications are published by the USPTO on Thursdays. This week's Spotlight Applications continue the theme of blockchains (smart contracts, distributed ledgers) and rights management broadly construed. Assigned to Salesforce, the first application discloses techniques to implement record level access on metadata driven blockchain using shared secrets and consensus on read. Assigned to Mastercard, the second application discloses techniques for generalized provenance solution for blockchain supply chain applications.
20200374106, "System or method to implement record level access on metadata driven blockchain using shared secrets and consensus on read," assigned to salesforce.com.
A method performed by a system of a host organization for providing access controls for data a blockchain, the system providing a blockchain interface to a blockchain on behalf of a plurality of tenants of the host organization each serving as nodes in a blockchain network. The method includes receiving a request including an identifier of a requestor, the request to access transaction data having defined privileges, requesting access to the transaction data from nodes in the blockchain network, a request for access including the identifier of the requestor, receiving at least one shared secret from an owner node in the blockchain network indicating consensus to access the transaction data by the requestor, and denying access to the transaction data in response to receiving insufficient shared secrets from the nodes indicating the requestor does not meet requirements of the defined privileges of the transaction data.
20200374131, "Method and system for generalized provenance solution for blockchain supply chain applications," assigned to Mastercard.
A method for conveying auditable information regarding provenance of a product that is cryptographically accurate while retaining complete anonymity of product and participant on a blockchain includes: receiving a product identifier; generating a digital token by applying a hashing algorithm to the product identifier; generating an entry value by applying the hashing algorithm to a combination of an event identifier and the digital token; generating a digital signature by digitally signing a data package using a private key of a cryptographic key pair, where the data package includes at least a blockchain address, the event identifier, and the digital token; and transmitting the blockchain address, the digital signature, and the entry value to a node in a blockchain network.