U.S. Patent 10068397 was awarded to Guardtime SA on September 04, 2018 and is entitled “System and method for access control using context-based proof.” The first named inventor is Jeffrey Pearce of Hilo, HI. The abstract contains an overview of the patent disclosure:

Control of access by a requesting entity to an asset includes defining an approved state of the requesting entity. A validation of a representation of the approved state of in a non-repudiatable form in obtained from an event validation system. The requesting entity is triggered to determine its current state by an access-control entity, which compares the current state with the approved state and allows access by the requesting entity to the asset only if the current state is the same as the approved state. In a pre-authorization procedure, one or both of the entities issues a data set challenge to the other, which then validates the challenge via the event validation system and returns this validation to the challenging entity, which then checks the validation to see if it is correct. Data sets may be validated, for example, with hash tree based signatures or blockchain entries. Link to Full Patent

This blockchain patent was originally filed on April 06, 2016  as U.S. Patent Application 15/091587 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 10068397. The primary examiner was Nam V Nguyen.

Guardtime SA, who is the original assignee of this patent, has at least 33 total granted patents in the United States as of the date of this article. This blockchain patent has been cited 5 times by other U.S. patents according to our law firm research, and can be considered an innovative patent in the field of cryptocurrency and blockchain.

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