Smart contracts (blockchains, distributed ledgers) and rights management broadly construed are the themes of today's Spotlight Patents. Assigned to China Unionpay (CN), the first patent address techniques for control of blockchain data access based on smart contracts. Assigned to Luther Systems, the second patent addresses techniques for secure management of digital contracts.
11687921, “Method and device for control of blockchain data access based on smart contract,” assigned to China Unionpay Co., Ltd. (CN)
The present disclosure provides a method and a device for control of blockchain data access based on a smart contract. The method includes obtaining, by a blockchain node, an access operation request of an institution, the access operation request including a transaction identifier of a transaction to be accessed, according to the transaction identifier, determining a blockchain state corresponding to the transaction identifier, the blockchain state including a hash value of the transaction corresponding to a last time change of the blockchain state, according to the hash value of the transaction corresponding to the last time change in the blockchain state and an identifier of the institution, performing data access control on the institution, obtaining control result, and transmitting the control result to the institution.
11687486, “System and method for secure management of digital contracts,” assigned to Luther Systems US Incorporated
A system and method for the secure management of digital contracts utilizes technology from the following fields: digital timestamping, encryption, distributed storage, and distributed payment systems. The existing state-of-the-art contract management systems require counter-parties to give a substantial level of trust to third parties to perform functions such as storage and verification. This system and method reduces the amount of trust that the counterparties need to give to a single third party. The system and method may be used for the secure construction and management of digital contract data and metadata.