Smart contracts, blockchains (distributed ledgers), and rights management broadly construed are the themes of today's Spotlight Patents. Assigned to ANT (KY), the first patent addresses techniques for information protection using blockchains. Assigned to SAP (DE), the second patent addresses techniques for data protection and privacy regulations based on blockchain.
11,277,389, "System and method for information protection," assigned to Advanced New Technologies (KY).
A computer-implemented method comprises: committing a transaction amount of a transaction with a commitment scheme to obtain a transaction commitment value, the commitment scheme comprising at least a transaction blinding factor; generating a first key of a symmetric key pair; encrypting a combination of the transaction blinding factor and the transaction amount t with the first key; and transmitting the transaction commitment value T and the encrypted combination to a recipient node associated with a recipient of the transaction for the recipient node to verify the transaction. The first key is a symmetrical key generated with Diffie-Hellman (DH) key exchange protocol that can be used to encrypt/decrypt the random numbers and the plaintext balances, thus providing convenient management. The method provides a robust privacy protection for transaction amounts, asset values, and blinding factors in commitment schemes.
11,277,411, "Data protection and privacy regulations based on blockchain," assigned to SAP (DE).
Described herein includes a data controller that secures personal data and efficiency and reliably records data access events using blockchain. The system may include a data controller for: receiving a request to access data stored in a database on the data controller, the request including a web token; verifying the web token of the request; providing access to the data stored in the database; generating a data access event indicating that the data stored in the database has been accessed; and recording the data access event on a blockchain platform in accordance with blockchain.