New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of blockchain (distributed ledger, smart contracts) and digital rights management broadly construed. Assigned to Amazon the first patent addresses techniques for signature delegation. Assigned to Bull SAS (FR), the second patent addresses techniques for the creation and management of decentralized authorizations for connected objects.
10,218,511, "Signature delegation," assigned to Amazon
A signature authority generates a master seed value that is used as the root of a seed tree of subordinate nodes. Each subordinate node of the seed tree is generated from the value of its parent node using a cryptographic hash or one-way function. The signature authority selects subordinate seed values which are distributed to one or more key generators, each of which generates a set of one-time-use cryptographic keys. Each key generator generates a hash tree from its set of one-time-use cryptographic keys, and the root of its hash tree is returned to the signature authority. The signature authority integrates the hashes provided by the key generators into a comprehensive hash tree. The root of the comprehensive hash tree acts as a public key for the signature authority.
10,216,948, "System and method for the creation and management of decentralized authorizations for connected objects," assigned to Bull SAS (FR).
Computing systems and methods for the creation and management of authorizations of blockchain objects. Systems and methods managed by a controlled number of governing entities allow the management of access authorizations for an object connected to a varying group of services. Systems and methods therefore have numerous advantages including strong inter-operability, strong resilience, confidentiality, autonomy, ensured data integrity and traceability.