Smart contracts, blockchains (distributed ledgers), and rights management broadly construed are the themes of today's Spotlight Patents. Assigned to Trend Micro (JP), the first patent addresses techniques for distributed digital rights management with decentralized key management. Assigned to Sony (JP), the second patent addresses techniques for blockchain-based digital rights management.
11,258,601, "Systems and methods for distributed digital rights management with decentralized key management," assigned to Trend Micro, Inc. (JP)
One embodiment disclosed relates to a system for digital data distribution with decentralized key management. The system utilizes a data provider, a data demander, cloud storage, a blockchain, and a smart contract registered with the blockchain. The data provider encrypts the digital data using a session key and puts the encrypted digital data to the cloud storage, which returns a URL for the stored digital data. In addition, the session key is itself encrypted using the public key of the data demander. The access data at the smart contract is updated with the encrypted session key and the URL. The data demander uses its own private key to decrypt the session key and then uses the session key to decrypt the digital data. Other embodiments and features are also disclosed.
11,258,587, "Blockchain-based digital rights management," assigned to Sony (JP).
Generating a rights blockchain storing rights of a user, including: receiving an enrollment request and a public key from the user; verifying that the user has a private key corresponding to the public key; generating a user identifier using the public key; and generating and delivering the rights blockchain having a genesis block including the user identifier to the user.