U.S. Patent 10297094 was awarded to Guardtime SA on May 21, 2019 and is entitled “Challenge-response 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:

Access by a requesting entity to an asset is authorized by an access-controlling entity, which transmits to the requesting entity a challenge data set and then receives from the requesting entity a response purportedly corresponding to a representation of the challenge data set in a non-repudiatable form, obtained from an event validation system. The access-controlling entity queries the event validation system to determine whether the response does correspond to a correct representation of the challenge data set in the non-repudiatable form, and authorizes the requesting entity for access only if the response is correct representation. Non-repudiation can be established through entry into a blockchain, or using a hash-tree-based digital signature infrastructure. Link to Full Patent

This blockchain patent was originally filed on December 29, 2017  as U.S. Patent Application 15/857635 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 10297094. 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 0 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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